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The ecological potential of the kudu for commercial production in savanna regions
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Owen‐Smith --- Centre for Resource Ecology,This paper considers the choice of a browsing ungulate to supplement cattle in savanna regions susceptible to problems of bush encroachment, and evaluates the kudu in particular. Relevant aspects of its ecology considered include (i) the vegetation components utilized at... -
The use of the cellulase digestion procedure for indexing the dry matter digestibility of forages
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P J K Zacharias --- Department of Grassland Science,The in vitro cellulase technique was compared with the rumen liquor technique and found to be more efficient for the indexing of the dry matter disappearance (DMD) of forages. A cellulase enzyme concentration of 80 IU/gDM gave a satisfactory linear... -
Potential of medic and lucerne pastures in the rûens area of the Southern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. van Heerden --- Department of Agriculture and Water Supply (Winter Rainfall Region), N.M. Tainton --- Department of Grassland Science,The potential of dryland lucerne and medic pastures was compared over a range of stocking rates, i.e. three, four, five, six, seven and eight merino ewes per hectare, in the Rûens area of the Southern Cape. It was found that... -
Production of plantlets from tissue cultures of Lotononis, a southern African veld legume1
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A.M. Thro --- Agronomy Department, Louisiana Agricultural Experimental Station, USA A.T. Wier --- Agronomy Department, Louisiana Agricultural Experimental Station, USA K.C. Torres --- , USA H.E. Flores --- Plant Pathology and Crop Physiology Department, College of Agriculture, USA M. Pillay --- Biology Department, USAA simple procedure is described for the production of large numbers of rooted plantlets from callus cultures of Lotononis bainesii Baker. Highest frequency of shoots was obtained from somatic embryos formed in initiation cultures on Murashige & Skoog medium plus... -
Influence of grazing management on the production of an irrigated grass/legume pasture in the Rûens area of the Southern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. vanHeerden --- Department of Agriculture and Water Supply (Winter Rainfall Region), N.M. Tainton --- Department of Grassland Science,The production of an irrigated grass/legume pasture was determined using Merino ewes on rotational and continuous grazing systems. The clover content of the pasture declined, while the grass content increased under both systems. The lucerne content of the rotationally‐grazed pastures... -
A comparison of grass and grass/legume pastures under irrigation in the Outeniqua area of the southern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. van Heerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa P.R. Botha --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South AfricaTwo grass and five grass/legume pastures were evaluated over a period of two seasons at two seasonally set grazing pressures and under two grazing management systems, involving five and seven paddocks per flock and a seven‐day period of stay. Grazing... -
Nitrogen fertilization, stocking rate and rotational grazing effects on steers grazing Pennisetum clandestinum
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.I. Bransby --- Department of Agronomy and Soils, U.S.A.Kikuyu pastures at the Ukulinga research farm near Pietermaritzburg were fertilized with 150 and 300 kg nitrogen (N) ha−1 in the summer periods of 1985–86 and 1986–87, and were continuously grazed with steers at stocking rates of 5.4, 8.0 and... -
Productivity of one‐ and two‐year‐old steers grazing Coastcross II (Cynodon hybrid) at four stocking rates
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.I. Bransby --- Department of Agronomy and Soils, United States of AmericaCoastcross II pastures were continuously grazed with 1‐ or 2‐year‐old steers at stocking rates between 5.4 and 13.4 animals ha−1 in 1985–86 and 1986–87 at the Ukulinga research farm near Pietermaritzburg. In the first season there was no difference between... -
Leucaena leucocephala as a quality supplement to Pennisetum clandestinum foggage: A preliminary study
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: P.J.K. Zacharias --- Department of Grassland Science, Republic of South Africa J. Clayton --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaThe performance of growing beef steers grazing foggaged dryland Pennisetum clandestinum (kikuyu) pastures and given limited access (3 h d−1) to Leucaena leucocephala cv. Cunningham (leucaena) was compared to that of steers grazing only kikuyu foggage during autumn and early... -
Evaluation of shrub species for sheep grazing in the Strandveld of the Cape West Coast of South Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: S.A. Barnard --- Department of Agricultural Development, Republic of South Africa J.M. van Heerden --- Department of Agricultural Development, Republic of South Africa H.S. Gerber --- Department of Agricultural Development, Republic of South AfricaThe production of three exotic shrub species, Atriplex nummularia (old man saltbush), A. canescens (four‐winged salt‐bush) and Medicago arborea (tree lucerne) and one indigenous evergreen shrub, Chrysanthemoides monilifera subsp. pisifera (west coast bitou), was evaluated in the Strandveld of the... -
Effects of level and timing of irrigation on growth and water use of lucerne
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Beukes --- Department of Agriculture and Water Supply, S.A. Barnard --- Department of Agriculture and Water Supply,A six-year flood irrigation trial with lucerne (Medicago sativa cv. Karoo) was conducted on a sandy loam soil in the south-western part of the Cape Province at Oudtshoorn. Two cropping practices, whereby one or two forage cuttings are followed by... -
Die invloed van nat grondtoestande op die vrugkwaliteit van appels
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- ,Vrugontledings op appels van bome op gedeeltelik versuipte gronde gedurende die vruggroei-periode het hoër Na- en B- en laer N- en Mg-peile getoon as appels van bome op droër gronde. Die vrugte van nat persele was fermer en het hoër... -
Evaluering van braakstelsels vir droëlandkoringverbouing in die Oranje-Vrystaat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Engelbrecht --- , Republiek van Suid-Afrika A.J. der Westhuizen --- , Republiek van Suid-Afrika G.D. Joubert --- , Republiek van Suid-AfrikaDrie produksiestelsels vir droëlandkoring is te Glen en Bethlehem geëvalueer. Die kortbraak was vyf tot ses maande, intermediêre-braak was 12 tot 13 maande en langbraak was 17 maande. Glen verteenwoordig 'n semi-ariede somerreëngebied waar die proefgrond 'n plantbeskikbare-waterstoorkapasiteit van 148... -
Water storage, soil temperatures and maize (Zea mays L.) growth for various tillage practices
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. A.J. Berry --- Summer Grain Sub-Centre, Republic of South Africa J.B. Mallett --- Summer Grain Sub-Centre, Republic of South Africa P.L. Greenfield --- Department of Crop Science, Republic of South AfricaFour tillage treatments ranging from conventional mouldboard ploughing through to direct-drilling were repeated during the second season of an ongoing experiment. At commencement of the new season, differences in plant- available water (PAW) in the top 600 mm of the... -
Factors affecting fruit quality and shelf life of Bon Chretien pears
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.J. van Zyl --- , Republic of South Africa J.M. Olivier --- Deciduous Fruit Board, Republic of South AfricaBon Chretien pears for canning and the fresh market are grown under various climatic conditions in South Africa. The major orchard factor affecting the shelf life of the fruit after storage seems to be the number of days between full-... -
Storage root formation at individual nodes of the sweet potato (Ipomoea batatas (L.) Lam)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.P. du Plooy --- , Republic of South Africa A.A. van den Berg --- , Republic of South Africa P.S. Hammes --- Department of Plant Production, Republic of South Africa L.C. Holtzhausen --- Department of Plant Production, Republic of South AfricaLittle or no information is available on the contribution of individual subterranean nodes to the storage root formation in sweet potatoes. Therefore, two field trials were conducted where apical vine cuttings of various cultivars were planted vertically or horizontally, with... -
Germination strategies of Strandveld Succulent Karoo plant species for revegetation purposes: III Effect of relative humidity and storage site on seed viability
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. de Villiers --- Department of Botany, Republic of South Africa M.W. van Rooyen --- Department of Botany, Republic of South Africa G.K. Theron --- Department of Botany, Republic of South AfricaChanges in seed viability owing to fluctuations in environmental conditions (temperature and relative humidity) are crucial factors to consider during post-mining revegetation efforts in the Strandveld Succulent Karoo. The effect of relative humidity and storage site on seed viability was... -
Honeybush (Cyclopia spp.) response to phosphorus fertilisation and mulching
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Joubert --- , South Africa P.S. Botma --- , South Africa W. A.G. Kotzé --- , South Africa J. Wooldridge --- , South AfricaHoneybush (Cyclopia spp.) is endemic to the Western- and Eastern Cape where it grows naturally in sandy, acidic, low- phosphorus (P) soils. The effects of different rates of applied P, and of mulches, on the growth of four honeybush species... -
Effect of indigenous storage method on performance of taro [Colocasia esculenta (L.) Schott] under field conditions in a warm subtropical area
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AlbertT. Modi --- ,Successful crop stand establishment, a critical prerequisite for efficient crop production, is primarily determined by propagule quality. Taro [Colocasia esculenta (L.) Schott] corms of different sizes (80–100 g corm−1, 40–60 g corm−1 and 20–30 g corm−1) that had been stored... -
Evaluation of near infrared spectra for the prediction of post harvest quality in canning peaches
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. Manley --- Department of Food Science, South Africa E. Joubert --- Department of Food Science, South Africa L. Myburgh --- Department of Food Science, South Africa L. Lotz --- , South Africa M. Kidd --- , South AfricaHuge production losses occur because of deterioration of quality of clingstone peaches during cold storage, rendering the fruit unsuitable for canning. Near infrared (NIR) spectra recorded from intact clingstone peaches were evaluated to predict post harvest quality of these peaches... -
Effects of storage conditions on transpiration rate of pomegranate aril-sacs and arils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Wilhelmina V Aindongo --- Department of Food Science, Faculty of AgriSciences, South Africa Oluwafemi J Caleb --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa Pramod V Mahajan --- Department of Horticultural Engineering, Germany Marena Manley --- Department of Food Science, Faculty of AgriSciences, South Africa Umezuruike L Opara --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South AfricaThis study investigated the effects of temperature (5, 10, 15 and 22 °C) and relative humidity (RH) (76%, 86% and 96%) on the transpiration rate (TR) of pomegranate (Punica granatum L.) cv. Bhagwa fruit fractions, namely arils and aril-sac. Both... -
Seasonal herbage production from two range types in southern Mozambique
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JP Muir A AlageEstimating ideal stocking rates in southern Mozambique based on range productivity is difficult since forage and foggage production of range types receiving different amounts of rainfall have not been quantified to date. Exclosures were constructed in upland and alluvial range... -
Seasonal variation in forage quality and mimosine contents of two varieties of Leucaena leucocephala
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AA Akingbade IV Nsahlai CD MorrisSeasonal variation in forage quality and mimosine contents of two varieties (cultivars Cunningham and Spectra) of Leucaena leucocepha/a were evaluated. Cultivar (cv.) Cunningham was available throughout summer, autumn, winter and spring seasons while cv. Spectra was available during summer, winter... -
Estimated spatial requirements of the medium- to large-sized mammals, according to broad habitat units, in the Cape Floristic Region, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AF Boshoff GIH Kerley RM CowlingConservation planning in the Cape Floristic Region (CFR) of South Africa, a recognised world plant diversity hotspot, required information on the estimated spatial requirements of selected medium- to large-sized mammals within each of 102 Broad Habitat Units (BHUs) delineated according... -
Effect of plant height at cutting, source and level of fertiliser on yield and nutritional quality of Napier grass (Pennisetum purpureum (L.) Schumach.)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: T Zewdu RMT Baars A YamiNapier grass (Pennisetum purpureum (L.) Schumach.) was studied using a 5 x 3 factorial experiment arranged in a randomised complete block design with three replications. The treatments were five fertiliser applications (0kg ha-1 N, 46kg ha-1 N and 92kg ha-1... -
Effects of sowing rate on growth and protein contents of wall barley (Hordeum murinum L.) grown under Mediterranean conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M K J El-Shatnawi M Turk H M SaoubAccurate control of the seeding rate favours the establishment of a high-quality stand. Improper seeding rates waste seed and reduce potential yield. Our objective for this research is to determine the proper sowing rate for wall barley (Hordeum murinum L.)... -
Effect of Acacia tortilis pods on intake, digestibility and nutritive quality of goat diets in southwestern Eritrea
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MengistuR Araya RobinsonK Ngugi NashonK R Musimba DicksonM NyarikiFresh Acacia tortilis pods were mixed with low quality native grass hay to form the following five rations: 100% hay (T1), 25% pods and 75% hay (T2), 50% pods and 50% hay (T3), 75% pods and 25% hay (T4) and... -
Status of range and forage research in Mozambique
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: InácioC Maposse JamesP Muir AlbertinaA AlageDomestic ruminant production in Mozambique is limited by a long dry season and lack of a well-defined breeding season to match forage supply. To date, research on pasture and forages has concentrated mainly on range vegetation mapping, forage adaptation and... -
Ecological effects of fire-breaks in the montane grasslands of the southern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'Connor RG Uys AJ MillsFire-breaks, by legislation, are burnt annually before mid-winter in the southern Drakensberg, affecting 5–10% of the landscape, and resulting in marked selection for the early season flush by both livestock and wildlife. This study investigated whether this severe defoliation regime... -
Seasonal botanical and chemical composition of sheep and goat diets on a common range in eastern Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: RobinsonK Ngugi JosephN Ndung'u DicksonM Nyariki NashonKR MusimbaThe botanical and chemical composition, intake and digestibility of local sheep (Ovis aries) and goat (Capra hirtus) diets were evaluated over the wet (growing) and dry (dormant) seasons. Diet botanical composition was related to the vegetation composition on the range... -
Voluntary intake, nitrogen metabolism and rumen fermentation patterns in sheep given cowpea, silverleaf desmodium and fine-stem stylo legume hays as supplementary feeds to natural pasture hay
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JJ Baloyi NT Ngongoni H HamudikuwandaThe effect of feeding legumes as protein supplements to veld hay on voluntary feed intake, nitrogen metabolism and rumen fermentation patterns was evaluated. Four sheep were randomly allocated to the four dietary treatments of either veld hay alone or veld... -
Influence of undersowing perennial forages in maize on grain, fodder yield and soil properties in the sub-humid region of western Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: A Hassen L Gizachew NFG Rethman WA van NiekerkIn the densely populated mixed farming areas of western Ethiopia, the integration of forages with food crops may be crucial to the achievement of sustainable crop and livestock production. This study investigated the effects of pure grass (Chloris gayana), legumes... -
Variation in nutritional composition and growth performance of some halophytic species grown under saline conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MY AshrafStudies were conducted at the Biosaline Research Station-II of the Nuclear Institute for Agriculture and Biology (NIAB), Faisalabad, Pakistan to evaluate biomass production and nutritive value of some salt-tolerant grasses and bushes, i.e. Leptochloa fusca, Sporobolus arabicus (Poaceae), Suaeda fruticosa,... -
New Sudangrass forage cultivars selected from the original population (Sorghum bicolor ‘Garawi’, syn. S. sudanense)
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: MaaroufI Mohammed --- Forage Research Program, SudanThe study represents the first efforts since 1909 to develop improved Sudangrass (Sorghum bicolor (L.) Moench, syn. S. sudanense (Piper) Stapf) cultivars from the original genetic stock existing in the Sudan. Seven Sudangrass genotypes generated by individual plant selection within... -
Establishment and early persistence of ten forage legumes under three grazing regimes in southern Mozambique
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.P. Muir --- , MozambiqueLeucaena leucocephala, Clitoria ternatea, Macroptilium atropurpureum cv. Siratro, Cassia rotundifolia cv. Wynn, Macrotyloma axillare cv. Archer, Stylosanthes guianensis var. guianensis cv. Graham, S. guianensis var. intermedia cv. Oxley, S. hamata cv. Verano and 5. scabra cv. Fitzroy and cv. Seca... -
Centrosema pubescens (centro) and Manihot esculenta (cassava) intercropping: The effect of spacing and time of planting centro on seed yield
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P. Lusembo --- , Uganda E.N. Sabiiti --- Department of Crop Science, Uganda J.S. Mugerwa --- Department of Crop Science, UgandaStudies were carried out to determine the effect of time of inter‐planting centro (Centrosema pubescens) with cassava (Manihot esculenta Crantz), at various spacings, on the seed yield components of centro. Apart from the seed yield itself, time of planting centro... -
Influence of nitrogen fertilisation on forage and animal production of a continuously grazed irrigated grass/clover pasture in the Rûens area of the southern Cape
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.M. van Heerden --- Department of Agricultural Development, Republic of South Africa W. Durand --- Department of Agricultural Development, Republic of South AfricaThe production of an irrigated grass/clover pasture was evaluated under continuous grazing at a range of stocking rates (20.6 to 35.9 Merino ewe units ha‐1 and two nitrogen fertiliser treatments (0 and 300 kg N ha‐1 a‐1) over a period... -
An evaluation of dryland legume and legume‐grass pastures based on lucerne and red clover, with sheep, using a put‐and‐take system in the outeniqua area of the Southern Cape
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.M. van Heerden --- Department of Agriculture, Republic of South Africa P.R. Botha --- Department of Agriculture, Republic of South AfricaThe production of a pure lucerne (Medicago sativa) pasture, two lucerne‐grass pastures and two red clover (Trifolium pratense)‐grass pastures was compared at two grazing pressures (3.5 and 4.0 kg DM per small stock unit d‐1) in the Outeniqua area, using... -
Effects of plant density on forage production in five populations of kleingrass
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: B.A. Young --- USDA‐ARS, United States C.R. Tischler --- USDA‐ARS, United StatesKleingrass (Panicum coloratum L.) forage yield evaluation plots are often established at a density of 6.0 plants m‐2 to accommodate mechanical transplanting and harvesting equipment. However, forage crops are usually established from seed at higher plant densities. Experiments were conducted... -
The distribution of sweetveld and sourveld in South Africa's grassland biome in relation to environmental factors
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: W.N. Ellery --- Department of Geographical and Environmental Sciences, Republic of South Africa R.J. Scholes --- CSIR, Republic of South Africa M.C. Scholes --- Centre for African Ecology, Department of Botany, Republic of South AfricaThe distribution of sweet‐ and sourveld in relation to climate, parent material and soil nutrients has been examined in South Africa's grassland biome. Sourveld occurs in areas with high water supply and where parent material gives rise to soils with... -
Agronomic evaluation of herbaceous legumes in a subhumid zone of Uganda
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P. Lusembo --- , Uganda M.A. Mohamed‐Saleem --- , Ethiopia T. Abate --- , Ethiopia E.N. Sabiiti --- Department of Crop Science, UgandaSixteen promising forage legume accessions (15 species) were selected from small plot observation trials for agronomic evaluation over three years in a subhumid zone of Uganda. Macrotyloma axillare (Archer) significantly out yielded all other accessions in terms of annual dry... -
The influence of stocking rate, range condition and rainfall on residual herbage mass in the semiarid savanna of KwaZulu/Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: G.P. Hatch --- Department of Grassland Science, Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaGrazing trials at two sites in the semiarid savanna of KwaZulu‐Natal were stocked with cattle at light (0.17 LSU ha‐1), intermediate (0.23 LSU ha‐1) and heavy (0.30 LSU ha‐1) stocking. Pasture disc meter data collected over 116 three‐week periods were... -
AU Triumph, Johnstone and Kentucky 31 tall fescue pastures versus maize silage in diets for lactating dairy cattle
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.F. Kabiligi --- , Rwanda B.R. Moss --- Department of Animal and Dairy Sciences, United States of America D.I. Bransby --- Agronomy Dept., United States of America J.L. Holliman --- , United States of America J.C. Lin --- Department of Animal and Dairy Sciences, United States of AmericaThe performance of lactating dairy cattle fed on a maize silage (S) dry‐lot scheme was compared with that of lactating dairy cattle switched abruptly from a dry‐lot regime to graze endophyte‐free Johnstone (J), Kentucky 31 (K), or AU Triumph (T)... -
Predicting animal production on sourveld: A species‐based approach
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.J. O'Reagain --- , Republic of South AfricaA simulation model was developed to predict average daily gain (ADG) in cattle and sheep grazing different species and swards of different species composition on Dohne Sourveld. The model was based upon measured ingestive and digestive characteristics of different grass... -
Factors influencing forage preference of bushbuck and boer goats for Subtropical Thicket plants
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.L. Haschick --- Terrestrial Ecology Research Unit, Department of Zoology, Republic of South Africa G.I.H. Kerley --- Terrestrial Ecology Research Unit, Department of Zoology, Republic of South AfricaDietary preference of bushbuck (Tragelaphus scriptus) and boer goats (Capra hircus) was determined for sixteen Subtropical Thicket plant species using cafeteria style selection trials. Principal components analysis was used to identify major axes of variation in the chemical contents of... -
Influence of bushdumps on the herbaceous understorey in a mesic Eastern Cape savanna
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M. Mapuma --- Eastern Cape Department of Agriculture, Republic of South AfiicaStudies of the effects of woody vegetation on herbaceous vegetation in southern Africa have focused almost exclusively on savannas with isolated trees with no attention given to multi‐species bushclump savannas. The influence of multi‐species bushdumps on herbaceous vegetation was investigated... -
The influence of nitrogen and defoliation on production and water‐use efficiency of Lolium multiflorum cv. Midmar
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.F. Theron --- Department of Agriculture, FSR‐E Unit, Republic of South Africa W.L.J. van Rensburg --- Department of Grassland Science, Republic of South AfricaThe objective of this study was to investigate the influence of different nitrogen fertiliser application levels in combination with different defoliation intervals on the dry matter (DM) production and water‐use efficiency of ryegrass (Lolium multiflorum,) cv. Midmar. In a field... -
The influence of sowing rate on the production and growth of wild oat (Avena fatua) in the depleted semi-arid rangelands of Jordan
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.K.J. El-Shatnawi H.Z. GhoshehThe objective of this work was to determine the proper sowing rate of wild oat (Avena fatua) in the depleted north-eastern semi-arid grasslands of Jordan. Wild oat seeding rates of 15, 30, 45 and 60 kg ha−l were evaluated in... -
Effects of storage conditions on chlorophyll content in diploid black wattle (Acacia mearnsii)
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S. Mathura S. L. Beck A. FosseyBlack wattle (Acacia mearnsii de Wild) is a commercially important forestry species in South Africa, however, being an exotic it is also seen as an invader of indigenous vegetation. Research into producing a sterile variety is underway and one such... -
Clonal propagation and storage of subtropical pines in Queensland, Australia
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: S.J. TruemanClonal forestry is the approach used for deployment of Pinus elliottii × P. caribaea hybrids in Queensland, Australia. Clonal forestry relies on the ability to maintain juvenility of stock plants while selections are made in field tests, so that genetic... -
Long-Term Antelope Population Monitoring in Southern Cape Forests
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Armin H.W. Seydack --- Department of Water Affairs and Forestry, Republic of South Africa Johan Huisamen --- Department of Water Affairs and Forestry, Republic of South Africa Rynhard Kok --- Department of Water Affairs and Forestry, Republic of South AfricaThe results of population monitoring of two forest antelope species in the Knysna forests (South Africa), the bushbuck (Tragelaphus scriptus) and blue duiker (Philantomba monticola) are presented. Most monitoring was done by faecal pellet group counting, but some track counts,... -
Responsible Alcoholic Beverages Sales and Services Training Intervention in Cape Town: A Pilot Study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Karl Peltzer --- Human Sciences Research Council & University of Limpopo, Shandir Ramlagan --- Human Sciences Research Council, Louis Gliksman --- Center for Addiction & Mental Health,The aim of this study was to pilot a responsible beverage service intervention in order to reduce alcohol-impaired road use. The sample included 20 shebeens including 10 licensed and 10 unlicensed establishments chosen from a list of alcohol serving establishments... -
The Galois Approach to Uniform Structures
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Maria João Ferreira Jorge PicadoEntourages in uniform spaces, being binary relations, may be easily described by polarities (i.e. Galois connections between power sets) and axialities (i.e. residuated pairs between power sets). Here we consider this in the pointfree context of the category of frames,... -
Trend analysis and short-term forecast of incident HIV infection in Ghana
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Patrick Aboagye-Sarfo --- School of Engineering, Australia James Cross --- School of Engineering, Australia Ute Mueller --- School of Engineering, AustraliaThe study uses time-series modelling to determine and predict trends in incident HIV infection in Ghana among specific age groups. The HIV data for Ghana were grouped according to northern and southern spatial sectors as they exhibited slightly different data... -
The Effect of Long Term Stratification on the Germination of Pinus Pinaster Ait
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D. G.M. Donald --- ,Trials to determine the effect of long term stratification on Pinus pinaster seed subjected to periods of room temperature storage following cold storage and cold storage only indicated that the former could reduce viability of the seedlots. Dormancy of all... -
Prey capture success and chick diet of Damara terns Sterna balaenarum in Namibia
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Braby --- Animal Demography Unit, Department of Zoology, South Africa LG Underhill --- Animal Demography Unit, Department of Zoology, South Africa RE Simmons --- Percy FitzPatrick Institute of African Ornithology, Department of Zoology, South AfricaFeeding terns are affected by a variety of environmental conditions. We studied prey capture success of Damara terns Sterna balaenarum in relation to six variables at two breeding colonies in southern Namibia: tidal phase, wind speed, water clarity, cloud cover,... -
Some notes on the effect of wet-storage on timber
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: F.S. Malan --- Komatiland Forests Pty Ltd, AfricaThe storage of logs under water sprays has proved to be a highly effective method to preserve logs over prolonged periods against drying defects and infestation by staining fungi. Wet-storage has little effect on wood quality apart from some degradation... -
Analysis of differences in field performance of vegetatively andseed-propagated Eucalyptus varieties II: vertical uprooting resistance
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MEO Mokotedi --- School of Biological and Conservation Sciences, Biological Sciences Building, South Africa MP Watt --- School of Biological and Conservation Sciences, Biological Sciences Building, South Africa NW Pammenter --- School of Biological and Conservation Sciences, Biological Sciences Building, South AfricaThe aim of this study was to establish whether roots of micropropagated Eucalyptus grandis× E. nitens differ in their vertical uprooting resistance and architecture when compared with those of macropropagated E. grandis× E. nitens and seed-propagated E. grandis and E... -
A model to predict productivity of different chipping operations
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MohammadR Ghaffariyan --- , Australia Raffaele Spinelli --- , Italy Mark Brown --- , AustraliaThe chipping operation is an important component of harvesting systems producing biomass and pulp chips. This paper aimed to develop a valid model to predict the productivity of chipping as part of these operations. Over a number of years more... -
Representations of HIV/AIDS management in South African newspapers
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Catherine Campbell Andy GibbsIn South Africa, numerous strong policy statements emphasise the importance of involving communities in HIV/AIDS management, yet in practice such involvement tends to be tokenistic and minimal. Social representations in the public sphere constitute the symbolic dimension within which responses... -
Employees' perceptions of the Aid-for-AIDS disease-management programme, South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Alan Rothberg Karen Van HuyssteenIt is estimated that 18–20% of South Africa's more than 5 million HIV-positive individuals are formally employed. Disease management programmes for these employees vary in scope and sophistication, with services provided by the employer, or third-party specialist disease managers, or... -
Application of a fish health assessment index and associated parasite index to Clarias gariepinus (Teleostei: Clariidae) in the Vaal River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Crafford --- Department of Zoology, South Africa A Avenant-Oldewage --- Department of Zoology, South AfricaThe aim of this study was to determine if the fish health assessment index (HAI) developed in the USA and associated parasite index (PI), when applied to Clarias gariepinus at two localities in the upper and middle Vaal River system,... -
Reproduction in the viviparous South African clinid fish Fucomimus mus
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: HG MoserDescription of the reproductive anatomy, histology and seasonality of reproduction of the viviparous clinid fish, Fucomimus mus, was based on a collection of 227 specimens from various intertidal localities off the south-east coast of South Africa. Males produce sperm throughout... -
Forage–cattle relationships in a communally managed semi-arid savanna in northern Zululand, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CC Nyamukanza PF Scogings NW KuneneDevelopment of extensive livestock production in KwaZulu-Natal is constrained by seasonal variability of rangeland production and low forage nutritional quality. A three-year study was implemented to determine the seasonal variation in herbaceous biomass and chemical composition of veld, animal weight,... -
Influence of mineral composition and rumen degradability of Atriplex nummularia (Hatfield Select F1) plants on selection preference of sheep
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: WA van Niekerk --- Department of Animal and Wildlife Sciences, South Africa Abubeker Hassen --- Department of Animal and Wildlife Sciences, South Africa LD Snyman --- Department of Animal and Wildlife Sciences, South Africa NFG Rethman --- Department of Plant Production and Soil Science, South Africa RJ Coertze --- Department of Animal and Wildlife Sciences, South AfricaThis study examined intraspecific variation in mineral composition and rumen degradability of Atriplex nummularia plants and the influence on selection preferences of sheep. Individual plants were categorised into high, medium and least preference groups by assessing the order in which... -
Cryopreservation as a tool for the conservation of Eucalyptus genetic variability: concepts and challenges
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: K Padayachee MP Watt N Edwards DJ MycockAn essential criterion of Eucalyptus tree breeding programmes employed by the commercial forestry sector is the maintenance of potentially important species and genotypes for periods commensurate with field testing. Current methods for this purpose include conservation stands, clonal hedges and... -
Current opinion: Is added dietary sugar detrimental to health?
Item type: Journal Article • Journal: South African Family Practice • Authors: VL Van den Berg --- Department of Nutrition and Dietetics,The intake of added dietary sugars has escalated dramatically since the 1970s, mostly due to a global increase in the consumption of sugar-sweetened beverages (SSBs). This trend has sparked concerns among scientists and consumers alike regarding the safety of added... -
Bee food: the chemistry and nutritional value of nectar, pollen and mixtures of the two
Item type: Journal Article • Journal: African Zoology • Authors: Susan W. Nicolson --- Department of Zoology and Entomology, South AfricaBees are herbivorous insects, consuming nectar and pollen throughout their life cycles. This paper is a brief review of the chemistry of these two floral resources and the implications for bee nutrition. Nectar is primarily an energy source, but in... -
Does supplemental feeding affect behaviour and foraging of critically endangered western giant eland in an ex situ conservation site?
Item type: Journal Article • Journal: African Zoology • Authors: Pavla Hejcmanová --- Faculty of Tropical AgriSciences, Czech University of Life Sciences, Czech Republic Pavla Vymyslická --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech Republic Magdalena Žáčková --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech Republic Michal Hejcman --- Faculty of Environmental Sciences, Czech University of Life Sciences, Czech RepublicThe western giant eland (Tragelaphus derbianus derbianus) needs appropriate management for its survival. We measured the effects of supplemental food on activity and browsing patterns during seasons of scarce natural food resources in 2008 and 2009 for a herd of... -
Structural traits of elephant grass (Pennisetum purpureum Schum.) genotypes under rotational stocking strategies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Carlos AM Gomide --- Embrapa Gado de Leite, Brazil Carla S Chaves --- Universidade Federal dos Vales do Jequitinhonha e Mucuri, Brazil Karina G Ribeiro --- Universidade Federal de Viçosa, Brazil Lynn E Sollenberger --- University of Florida, USA Domingos SC Paciullo --- Embrapa Gado de Leite, Brazil Tatiana P Pereira --- Universidade Federal Rural do Rio de Janeiro, Brazil Mirton JF Morenz --- Embrapa Gado de Leite, BrazilDespite the forage potential of elephant grass, controlling canopy structure during grazing has limited its use in pasture. This study was conducted to determine the effect of grazing frequency and post-grazing height on canopy structural characteristics of elephant grass genotypes... -
Phenotypic characterisation of sweetpotato genotypes grown in East and Central Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Rukundo Placide --- African Centre for Crop Improvement, South Africa Hussein Shimelis --- African Centre for Crop Improvement, South Africa Mark Laing --- African Centre for Crop Improvement, South Africa Daphrose Gahakwa --- Rwanda Agriculture Board, RwandaIdentification of genetic variability and interrelationships among germplasm collections is fundamental to select parents with complementary traits for plant breeding programmes. The aim of this study was to characterise and identify breeding parents among 54 sweetpotato genotypes grown in Rwanda,... -
Employing the prespecified variable approach to APT factor identification on the segmented Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Paul van Rensburg --- Department of Accounting and Finance,Prior research has provided evidence that the return generating process on the Johannesburg Stock Exchange (JSE) is dichotomous in nature (Campbell, 1979; Gilbertson and Goldberg, 1981;Carter, 1983; Page, 1986, 1989; Venter, Bradfield and Bowie, 1992). More specifically, this prior work... -
Unifying the factor analytic and prespecified variable approaches to APT factor identification on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: P van Rensburg --- Department of Accounting and Finance,This paper reviews recent empirical work concerning the number and macroeconomic nature of the priced Arbitrage Pricing Theory (APT) factors on the Johannesburg Stock Exchange (JSE). As a consolidation of prior factor analytic and prespecified variable findings, a brief empirical... -
The effect on taxpayers of new tax legislation regarding foreign exchange transactions
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: R Oberholzer --- Department of Taxation, J S Wilcocks --- School of Applied Accountancy,Numerous problems have been encountered with the practical application of the new taxation legislation relating to foreign currency transactions. The purpose of this paper is to analyse the amendments relating to foreign exchange transactions and to illustrate, by using examples,... -
On pricing kernels, information and risk
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Diane L. Wilcox --- School of Computational & Applied Mathematics, South Africa Tim J. Gebbie --- School of Computational & Applied Mathematics, South AfricaThis paper compares out-of-sample, ex-ante risk and returns of arbitrage pricing theory (APT) risk-factor based, zero-cost portfolios with characteristic-based, zero-cost portfolios. In particular the Haugen and Baker characteristic-based model framework is used in a comparison with the capital asset pricing... -
Macroeconomic variables and the Johannesburg Stock Exchange: A multifactor approach
Item type: Journal Article • Journal: De Ratione • Authors: Paul Van Rensburg --- Department of Accounting,This study estimates the simultaneous relationship between a number of selected macroeconomic variables and share prices on the Johannesburg Stock Exchange (JSE). A linear factor model identical in form to that assumed by the arbitrage pricing theory (APT) is estimated... -
Further Evidence of Firm Size and Earnings Anomalies on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: De Ratione • Authors: Michael J. Page --- Graduate School of Business,In spite of the large body of evidence in favour of capital market efficiency in the semi-strong form, several enigmatic findings persist. As much of the research is based on the theoretical foundation of the Capital Asset Pricing Model, the... -
An investigation in purchasing practices of small F&B operators
Item type: Journal Article • Journal: • Authors: Michel Altan --- Academy of Hospitality and Facility Management, NHTV Breda, The Netherlands Christine Demen-Meier --- Ecole Hôtelière de Lausanne, Le Chalet-à-Gobet, SwitzerlandThe food and beverage (F&B) purchasing function is operating in a rapidly changing environment, whereby professionalisation and efficiency become key. This paper aims to identify generic skills that are most important for small F&B operators when it comes down to purchasing and... -
Seasonal dry matter production, botanical composition and forage quality of kikuyu over-sown with annual or perennial ryegrass
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Janke van der Colf --- Department of Plant Production and Soil Science, South Africa Philip R Botha --- Western Cape Department of Agriculture, South Africa Robin Meeske --- Western Cape Department of Agriculture, South Africa Wayne F Truter --- Department of Plant Production and Soil Science, South AfricaThe seasonal growth and low forage quality of kikuyu restrict milk production. The aim of this study was to determine the yield and nutritional value of irrigated kikuyu over-sown with perennial, Italian or Westerwolds ryegrass grazed by dairy cows. The... -
Southern African pasture and forage science entering the 21st century: past to present
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Wayne F Truter --- Department of Plant Production and Soil Science, South Africa Philip R Botha --- Directorate Plant Sciences, Western Cape Department of Agriculture, South Africa Chris S Dannhauser --- Grass SA, Waverley, South Africa Barbara V Maasdorp --- Department of Crop Science, Zimbabwe Neil Miles --- South African Sugarcane Research Institute, South Africa Albert Smith --- Stats4science, South Africa Hennie A Snyman --- Department of Animal, Wildlife and Grassland Sciences, South Africa Neil M Tainton --- Amber Valley, South AfricaGiven the global challenges of mitigating and alleviating land degradation and ensuring food security, particularly through protein production, pasture and forage science together with rangeland science will remain imperative to sustainable livestock production systems. Recognising the scientific principles developed in... -
Homecoming of Brachiaria: Improved Hybrids Prove Useful for African Animal Agriculture
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: B. L. Maass --- International Center for Tropical Agriculture (CIAT), Kenya C. A. O. Midega --- African Insect Science for Food and Health, (ICIPE), Kenya M. Mutimura --- Rwanda Agriculture Board (RAB), Rwanda V. B. Rahetlah --- Centre de Développement Rural et de Recherche Appliquée, Madagascar P. Salgado --- Mediterranean and Tropical Livestock Systems, CIRAD, UMR SELMET, Madagascar J. M. Kabirizi --- National Livestock Resources Research Institute (NaLIRRI), Uganda Z. R. Khan --- African Insect Science for Food and Health, (ICIPE), Kenya S. R. Ghimire --- Biosciences Eastern and Central Africa (BecA)-ILRI Hub, Kenya I. M. Rao --- International Center for Tropical Agriculture (CIAT), ColombiaSpecies of the genus Brachiaria originate primarily from Africa, where they are constituents of natural grasslands. Due to their adaptation to acidic, low-fertility soils, millions of hectares of Brachiaria species have been sown as improved pastures in South and Central... -
What factors drive fishery yields in the Lower Shire River, Malawi?
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: D Tweddle --- South African Institute for Aquatic Biodiversity, South AfricaThe Shire River drains from Lake Malawi to the Lower Zambezi River. Annual flow is dependent mainly on lake level, partially controlled by the operation of a barrage at Liwonde to regulate flows for hydroelectricity generation in the escarpment reaches... -
Cervical cancer screening programme in Limpopo province: January 2007 to December 2010
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: M T Mamahlodi --- HIV/AIDS, National Institute for Communicable Disease; National Health Laboratory Services; School of Health Systems and Public Health, University of Pretoria, L R Kuonza --- National Institute for Communicable Diseases, South Africa S Candy --- Corporate Data Warehouse; National Health Laboratory Services,Objective: South Africa launched a cervical screening policy in 2001 and aimed to screen 70% of women aged 30 years and older by the year 2010. The current study describes the performance of the cervical cancer screening programme that was... -
Temporal and spatial dynamics of mineral levels of forage, soil and cattle blood serum in two semi-arid savannas of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Alice F Gwelo --- Department of Livestock and Pasture, South Africa Solomon Tefera --- Department of Livestock and Pasture, South Africa Voster Muchenje --- Department of Livestock and Pasture, South AfricaIn this study, we examined temporal and spatial dynamics of minerals of forage, soil and cattle serum in two savannas (valley and plain) of South Africa. The aims were to explore the relationships between ecosystem components, and plan communal grazing... -
Apparent digestibility and microbial protein yield of Desmodium uncinatum, Mucuna pruriens and Vigna unguiculata forage legumes in goats
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Simbarashe Katsande --- Department of Animal Science, School of Agriculture, South Africa Joseph J Baloyi --- Department of Animal Science, School of Agriculture, South Africa Florence V Nherera-Chokuda --- Agricultural Research Council, South Africa Nobbert T Ngongoni --- Faculty of Agriculture, Zimbabwe Gift Matope --- Paraclinical Department of Veterinary Sciences, Zimbabwe Plaxedis I Zvinorova --- Paraclinical Department of Veterinary Sciences, Zimbabwe Jacob Gusha --- Paraclinical Department of Veterinary Sciences, ZimbabweThis study examined the effects of adding forage legumes as protein supplements to poor-quality natural pasture (veld) hay offered to goats on microbial protein yield and nitrogen metabolism. Four indigenous Nguni-type goats were used in a 4×4 Latin cross-over design... -
Idiosyncratic risk and anomaly persistence on the Johannesburg Stock Exchange (JSE)
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Daniel Page --- School of Economic & Business Sciences, University of the Witwatersrand, South Africa James Britten --- School of Economic & Business Sciences, University of the Witwatersrand, South Africa Christo Auret --- School of Economic & Business Sciences, University of the Witwatersrand, South AfricaThis study examines arbitrage costs and the persistence of the size, value and momentum premiums on the Johannesburg Stock Exchange (JSE). Two arbitrage costs are considered: transaction and holding costs. Transaction costs refer to indirect and direct costs of engaging... -
South African dietary total antioxidant capacity based on secondary intake data in relation to dietary recommendations
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: H Louwrens --- Department of Agricultural and Food Sciences, South Africa F Rautenbach [AN0001] I Venter --- Faculty of Applied Sciences,Objective: In this exploratory study, the average adult South African dietary total antioxidant capacity (TAC) was estimated using secondary data and was evaluated against that determined for dietary intake recommendations. -
Food and beverage marketing to children in South Africa: mapping the terrain
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Sb Cassim --- School of Management, South AfricaThe prevalence of overweight and obesity, particularly in children, raises serious attention to its causes and possible interventions. Food marketing to children has in recent years come under scrutiny as one of the putative factors responsible for the rising rates... -
Vegetative propagation of twelve fodder tree species indigenous to the Sahel, West Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Catherine Ky-Dembele --- World Agroforestry Centre, Mali Jules Bayala --- World Agroforestry Centre, Mali Antoine Kalinganire --- World Agroforestry Centre, Mali Fatoumata Tata Traoré --- World Agroforestry Centre, Mali Bréhima Koné --- World Agroforestry Centre, Mali Alain Olivier --- Département de phytologie, CanadaIn the Sahel region, many woody species are used as fodder because of their high nitrogen content, especially during the dry season, in contrast to grasses and crop residues. Unfortunately, this resource is being threatened by regular pruning, increasing livestock... -
The potential of replacing conventional dairy supplements with forage legume-based diets in Zimbabwe’s smallholder dairy sector
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lovemore C Gwiriri --- International Livestock Research Institute, Zimbabwe Godfrey Manyawu --- International Livestock Research Institute, Zimbabwe Promise B Mashanda --- Department of Animal Science, Zimbabwe Irenie Chakoma --- International Livestock Research Institute, Zimbabwe Siboniso Moyo --- International Livestock Research Institute, Ethiopia Charles Chakoma --- Independent, Zimbabwe Hazel Sethaunyane --- Chikwaka-Kubatana Dairy Co-operative, Zimbabwe Venancio E Imbayarwo-Chikosi --- Department of Animal Science, Zimbabwe Sikhalazo Dube --- International Livestock Research Institute, Zimbabwe Barbara V Maasdorp --- Department of Crop Science, ZimbabweThe effect of replacing commercial supplements with isoenergetic and isonitrogenous velvet bean-, cowpeaand lablab-based supplements on milk yield, milk quality and economic returns in smallholder crossbred dairy cows was investigated in the 2013 and 2014 dry seasons. Using 3 ×... -
Forage seed production and trade as a pathway out of poverty in the smallholder sector: lessons from the Zimbabwe Crop Livestock Integration for Food Security (ZimCLIFS) project
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Irenie Chakoma --- International Livestock Research Institute, Zimbabwe Lovemore C Gwiriri --- International Livestock Research Institute, Zimbabwe Godfrey Manyawu --- International Livestock Research Institute, Zimbabwe Sikhalazo Dube --- International Livestock Research Institute, Zimbabwe Mercy Shumba --- Community Technology Development Organisation, Zimbabwe Aleck Gora --- Cluster Agricultural Development Services, ZimbabweThe major challenge to adoption of improved forage technologies in the smallholder farming sector is poor accessibility to seed of improved cultivars. Since 2012, the Zimbabwe Crop Livestock Integration for Improved Food Security (ZimCLIFS) project set out to address such... -
Promoting the use of home-mixed supplements as alternatives to commercial supplements in smallholder beef production systems in the subhumid region of Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Irenie Chakoma --- International Livestock Research Institute, Zimbabwe Godfrey Manyawu --- International Livestock Research Institute, Zimbabwe Lovemore C Gwiriri --- International Livestock Research Institute, Zimbabwe Siboniso Moyo --- International Livestock Research Institute, Ethiopia Sikhalazo Dube --- International Livestock Research Institute, Zimbabwe Venancio E Imbayarwo-Chikosi --- Department of Animal Science, Zimbabwe Tinyiko E Halimani --- Department of Animal Science, Zimbabwe Charles Chakoma --- , Zimbabwe Barbara V Maasdorp --- Department of Crop Science, Zimbabwe Victor Buwu --- Department of Animal Science, ZimbabweThe economic and performance effect of supplementing smallholder cattle by substituting commercial feed with iso-nitrogenous and iso-energetic diets based on alternative protein sources was investigated in two trials. In trial 1, three diets (commercial concentrate, commercial concentrate partially substituted with... -
First record of a spiral form of Aulacoseira, A. ambigua f. japonica (F.Meister) Tuji & D.M.Williams, in South African fresh waters
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, North-West University, South Africa JC Taylor --- Unit for Environmental Sciences and Management, North-West University, South AfricaWater quality and algal populations in the Vaal River Barrage Reservoir have been monitored extensively for many decades, because of its importance as a water source for the most densely populated area in South Africa. Although Aulacoseira granulata (Ehrenberg) Simonsen... -
An investigation in purchasing practices of small F&B operators
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Michel Altan --- Academy of Hospitality and Facility Management, NHTV Breda, The Netherlands Christine Demen-Meier --- Ecole Hôtelière de Lausanne, Le Chalet-à-Gobet, SwitzerlandThe food and beverage (F&B) purchasing function is operating in a rapidly changing environment, whereby professionalisation and efficiency become key. This paper aims to identify generic skills that are most important for small F&B operators when it comes down to... -
Towards a new model to benchmark firms’ operating efficiency: A data envelopment analysis approach
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Merwe Oberholzer --- Accounting Sciences, South Africa Dawie Mong --- Accounting Sciences, South Africa Jan van Romburgh --- Accounting Sciences, South AfricaThe purpose of the study was to construct two similar data envelopment analysis (DEA) models. The first contains only published accounting-based data and the second added weighted average cost of capital (WACC), a primary market-based determinant, as an input variable... -
The Internationalization of African Small and Medium Enterprises (SMEs): A South-North Pattern
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Everlyne Misati --- Florida International University, USA Fred O. Walumbwa --- Florida International University, USA Somnath Lahiri --- Illinois State University, USA Sumit K. Kundu --- Florida International University, USADespite the growing internationalization of small and medium enterprises (SMEs) from Africa, related research remains limited. Adopting a qualitative approach, this study investigates three SMEs in the African coffee subsector that internationalized rapidly beyond the continent. The case studies, based... -
Defoliation management affects morphogenetic and structural characteristics of mixed pastures of brachiaria grass and forage peanut
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Juliana C Pereira --- Department of Animal Science, Brazil Fernanda K Gomes --- Department of Animal Science, Brazil Michael DBL Oliveira --- Department of Animal Science, Brazil Marcio AS Lara --- Department of Animal Science, Brazil Thiago F Bernardes --- Department of Animal Science, Brazil Daniel R Casagrande --- Department of Animal Science, BrazilA sound understanding of the effects of defoliation management in a grass–legume pasture is key in balancing populations between species. The aim of this study was to quantify the morphogenetic and structural characteristics and forage production of brachiaria grass and... -
Optimal grazing management strategies: evaluating key concepts
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Richard WS Fynn --- Okavango Research Institute, University of Botswana, Botswana Kevin P Kirkman --- Grassland Science, South Africa Riaan Dames --- , NamibiaRangeland management strategies must be based on robust ecological and economic concepts if they are to be effective and profitable. Thus, the aim of this paper was to examine concepts related to grazing and resting of grassland and associated effects... -
Human health risks of metals and metalloids in muscle tissue of Synodontis zambezensis Peters, 1852 from Flag Boshielo Dam, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Sara --- Department of Biodiversity, South Africa SM Marr --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa WJ Smit --- Department of Biodiversity, South Africa LJC Erasmus --- Department of Physiology and Environmental Health, South Africa WJ Luus-Powell --- Department of Biodiversity, South AfricaMuscle tissue from 63 Synodontis zambezensis collected bimonthly in 2013 at Flag Boshielo Dam were analysed for metals and metalloids in a desktop human health risk assessment. The Hazard Quotient, based on a weekly meal of 67 g of fish... -
Evaluating oat cultivars for dairy forage production in the central Kenyan highlands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon W Mwendia --- Centro Internacional de Agricultura Tropical, Tropical Forages, Kenya Brigitte L Maass --- Centro Internacional de Agricultura Tropical, Tropical Forages, Kenya David G Njenga --- International Fertilizer Development Center, Kenya Fridah N Nyakundi --- Centro Internacional de Agricultura Tropical, Biometrics, Kenya An Maria O Notenbaert --- Centro Internacional de Agricultura Tropical, Tropical Forages, KenyaWith the projected increase in future demand for animal products, efforts to raise animal productivity are necessary to match the rise. Already, the estimated per-capita milk consumption in Kenya has increased to 150 L from 100 L estimated in 1998... -
Possible rehabilitation methods of Galenia africana-dominated old lands in the Cederberg Mountains, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nelmarie Saayman --- Directorate Plant Sciences, South Africa Clement Cupido --- Agricultural Research Council–Animal Production Institute, c/o Department of Biodiversity and Conservation Biology, South Africa Hannes Botha --- Western Cape Department of Agriculture, South Africa Rudi Swart --- Western Cape Department of Agriculture, South AfricaSeveral methods to rehabilitate old cropping lands in the Cederberg Mountains were tested to determine what type of soil disturbance, if any, and which of five indigenous perennial plant species are the most successful and economically feasible. Old lands are... -
Determinants of forage adoption and production niches among smallholder farmers in Kenya
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Donald MG Njarui --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Mwangi Gatheru --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Elias M Gichangi --- Kenya Agricultural and Livestock Research Organization-Katumani, Kenya Elikana M Nyambati --- Kenya Agricultural and Livestock Research Organization-Headquarters, Kenya Clotilda N Ondiko --- Kenya Agricultural and Livestock Research Organization-Mtwapa, Kenya Keziah W Ndungu-Magiroi --- Kenya Agricultural and Livestock Research Organization-Kitale, KenyaA study was conducted to assess factors that influence adoption of forages and choice of production niches in smallholder farms in Kenya. A total of 786 farmers (268 from coastal lowlands, 171 from eastern midlands, 132 from central highlands and... -
Modelling and performance of an automated small hybrid plant
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Samuel Ilupeju --- Discipline of Mechanical Engineering, Durban, South Africa Freddie Inambao --- Discipline of Mechanical Engineering, Durban, South Africa Yetunde Ilupeju --- Discipline of Mechanical Engineering, Durban, South Africa Taha Selim Ustun --- Electrical Engineering, Carnegie Mellon University, USASmall rivers that can generate useful quantities of electricity are freely and proportionally distributed in Africa. Thousands of potential sites are available in South Africa, capable of generating hundreds of megawatts. Small hydropower generation is not a new approach in... -
In search of conclusive evidence on the trade-off and pecking order theories of capital structure: Evidence from the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chimwemwe Chipeta --- School of Economic and Business Sciences, South Africa David McClelland --- School of Economic and Business Sciences, South AfricaThis paper tests the validity of the trade-off and pecking order theories of capital structure for non-financial firms listed on the Johannesburg Stock Exchange. Firstly, we find that the pecking order model is superior than the partial adjustment regressions at... -
Tumour and treatment factors influencing the outcome of chemo-radiation in stage IIB cervical cancer: a single institution experience
Item type: Journal Article • Journal: Southern African Journal of Gynaecological Oncology • Authors: Mtabeni Jemu --- Division of Radiation Oncology, South Africa Leon van Wijk --- Division of Radiation Oncology, South Africa Michelle Parker --- Radiobiology Section, Division of Radiation Oncology, South Africa Glenn Jones --- School of Clinical Medicine and Research, BahamasObjective: This study examined the effects of treatment and tumour factors on the overall survival of patients completing chemo-radiation for stage IIB cervical cancer, to identify modifiable factors that might improve outcome. -
Effects of urea addition on the fermentation of sorghum (Sorghum bicolor) silage
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ana Paula Maia dos Santos --- Programa de Pós-Graduação em Zootecnia, Brazil Edson Mauro Santos --- Programa de Pós-Graduação em Zootecnia, Brazil Juliana Silva de Oliveira --- Programa de Pós-Graduação em Zootecnia, Brazil Ossival Lolato Ribeiro --- Universidade Federal do Recôncavo da Bahia, Brazil Alexandre Fernandes Perazzo --- Bolsista DCR/FAPESB/CNPq, Brazil Ricardo Martins Araújo Pinho --- Programa de Pós-Graduação em Zootecnia, Brazil Alberto Jeferson da Silva Macêdo --- Programa de Pós-Graduação em Zootecnia, Brazil Gildenia Araújo Pereira --- Programa de Pós-Graduação em Zootecnia, BrazilThis study was conducted to evaluate the effects of urea addition on fermentation characteristics, losses and chemical composition of silage of sorghum (Sorghum bicolor) ‘BRS Ponta Negra’. The sorghum plant was chopped and treated with different levels of urea (0.1756,... -
Oat silage for grazing dairy cows in small-scale dairy systems in the highlands of central Mexico
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Victor Andrés Burbano-Muñoz --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Felipe López-González --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Julieta Gertrudis Estrada-Flores --- Instituto de Ciencias Agropecuarias y Rurales, Mexico Pedro Alan Sainz-Sánchez --- Institut für Tropische Agrarwissenschaften (Hans-Ruthenberg-Institute), Fachgebiet Tierernährung und Weidewirtschaft in den Tropen und Subtropen, Germany Carlos Manuel Arriaga-Jordán --- Instituto de Ciencias Agropecuarias y Rurales, MexicoThe objective was to evaluate the provision of oat silage (Avena sativa) to supplement grazing dairy cows on pastures of perennial ryegrass (Lolium perenne), festulolium (Lolium multiflorum × Festuca pratense) and white clover (Trifolium repens) during the dry season when... -
The investment return puzzle on the Johannesburg Stock Exchange
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Pravin Semnarayan --- Gordon Institute of Business Science, University of Pretoria, South Africa Michael Ward --- Gordon Institute of Business Science, University of Pretoria, South Africa Chris Muller --- Gordon Institute of Business Science, University of Pretoria, South AfricaFirms that invest into positive net present value projects should outperform firms that do not invest. Surprisingly, several studies on United States data have found a negative relationship between capital investment and subsequent shareholder return. There are conflicting explanations for... -
Underage drinking as a predictor of alcohol use disorder among African Americans
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Euchay Ngozi Horsman --- School of Counseling, Human Performance, and Rehabilitation, College of Education and Health Professions, USAThis study aimed to examine the effect of underage drinking (UD) on alcohol use disorder (AUD) among African Americans. Data from the 2010 National Survey of Drug Use and Health (NSDUH) (N = 19 240; age range 25–75 years) were... -
Degradability of amino acids in selected legume forages using the in situ nylon-bag technique
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Simbarashe Katsande --- Department of Animal Science, South Africa Joseph J Baloyi --- Department of Animal Science, South Africa Florence V Nherera-Chokuda --- Agriculture Research Council–Animal Production and Animal Health, South Africa Nobbert T Ngongoni --- Faculty of Agriculture, Zimbabwe Jacob Gusha --- Department of Paraclinical Veterinary Studies, Zimbabwe Gift Matope --- Department of Paraclinical Veterinary Studies, Zimbabwe Plaxedis I Zvinorova --- Department of Paraclinical Veterinary Studies, ZimbabweThis study was conducted to determine the amino acid profiles and rumen degradability of amino acids of three cultivated forage legumes – velvet bean (Mucuna pruriens), cowpea (Vigna unguiculata) and silverleaf desmodium (Desmodium uncinatum) – using the in situ nylon-bag... -
Cold storage for low-cost air-conditioning
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Daniel M. Madyira --- Department of Mechanical Engineering Science, South AfricaBuilding heating, ventilation and air-conditioning (HVAC) consumes 50% of the building energy consumption. Such high costs are based on the conventional HVAC cycles for air cooling based on grid connected buildings. However, there are alternative passive and active cold storage... -
Human health risks of metalloids and metals in muscle tissue of silver carp Hypophthalmichthys molitrix (Valenciennes, 1844) from Lake Flag Boshielo, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JR Sara --- Department of Biodiversity, South Africa SM Marr --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa NM Chabalala --- Department of Biodiversity, South Africa WJ Smit --- Department of Biodiversity, South Africa LJC Erasmus --- Department of Physiology and Environmental Health, South Africa WJ Luus-Powell --- Department of Biodiversity, South AfricaThe Olifants River, a major tributary of the Limpopo River, is one of the most polluted rivers in South Africa. Consequently, concerns regarding the human health impact of long-term consumption of fish from the Olifants River have been raised in... -
When less is more: heterogeneity in grass patch height supports herbivores in counter-intuitive ways
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Rina CC Grant --- Department of Zoology, South Africa Judith Botha --- Scientific Services Kruger National Park, South Africa Thelani C Grant --- Faculty of Animal and Wildlife Science, South Africa Mike JS Peel --- Agricultural Research Council–Animal Production, South Africa Izak PJ Smit --- Scientific Services Kruger National Park, South AfricaHerbivores are an integral part of the African landscape and have evolved with the vegetation to create the savanna landscape. Managers of these landscapes can benefit from a better understanding of how indigenous herbivores use the landscape to which they... -
The perceptions of general practitioners on National Health Insurance in Chris Hani district, Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Family Practice • Authors: Mthetheleli Mbongeni Gaqavu --- Division of Family Medicine and Primary Care, South Africa Robert Mash --- Division of Family Medicine and Primary Care, South AfricaBackground: National Health Insurance (NHI) intends to provide universal health coverage to all South Africans, with equity and quality as its tenets. The participation of private general practitioners (GPs) in NHI is essential. The aim was to explore perceptions of... -
Communal farmers’ ecological knowledge and perceptions of grasses in the central Eastern Cape province, South Africa: similarities with field studies and scientific knowledge and their implications
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon Tefera --- Department of Livestock and Pasture Science, South Africa Ayanda Kwaza --- Department of Livestock and Pasture Science, South AfricaThe local ecological knowledge (LEK) and perceptions of grasses were investigated in six semi-arid communal areas in the central Eastern Cape province, South Africa, and compared with field studies and scientific knowledge. Of the total of 21 grasses identified in... -
Forage seed value chain analysis in a subhumid region of Zimbabwe: perspectives of smallholder producers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Irenie Chakoma --- Graduate School of Business and Leadership, South Africa Bibi Zaheenah Chummun --- Graduate School of Business and Leadership, South AfricaIn smallholder systems, farmers are increasingly becoming aware of the need to improve livestock productivity through production of quality fodder. This is in response to scarcity of feed, particularly in the dry season, associated with seasonal variations, land degradation and... -
Seasonal variation of livestock feed resources in semi-arid and humid environments of Rwanda
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: Mupenzi Mutimura --- University of KwaZulu-Natal, South Africa Cyprian Ebong --- Rwanda Agriculture Board (RAB), Rwanda Idupulapati M Rao --- International Centre for Tropical Agriculture (CIAT), Colombia Ignatius V Nsahlai --- University of KwaZulu-Natal, South AfricaIn most of sub-Saharan African countries, including Rwanda, the predominant agricultural production is from a mixed-crop-livestock farming system, because of small size land holding. The objective of this study was to assess the seasonal availability of livestock feed resources in... -
Disc pasture meter calibration to estimate grass biomass production in the arid dunefield of the south-western Kalahari
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Christiaan J Harmse --- Eiland Research Station, Northern Cape Department of Agriculture, Land Reform and Rural Development, South Africa Niels Dreber --- Department of Ecosystem Modelling, Faculty of Forest Sciences and Forest Ecology, Germany Winston SW Trollope --- Working on Fire International, South AfricaThe disc pasture meter (DPM) is a tool that is widely used to estimate aboveground standing grass biomass (ASB) in a rapid and non-destructive manner. Depending on the species composition, rangeland condition and local climate, available DPM calibrations may fail... -
It’s politics, stupid! A political analysis of the HIV/AIDS Trust Fund in Uganda
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Charles Birungi --- Institute for Global Health, University College London, United Kingdom Timothy Colbourn --- Institute for Global Health, University College London, United KingdomThe role of trust funds in the practice of and the policy discourse on the sustainable financing for health and HIV is growing. However, there is a paucity of political analyses on implementing trust fund arrangements. Drawing on a novel... -
Conceptual framework for the evaluation of sugar tax systems
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Marese Lombard --- School of Accountancy, Faculty of Economic and Management Sciences, South Africa Alta Koekemoer --- School of Accountancy, Faculty of Economic and Management Sciences, South AfricaThe World Health Organization has urged countries to implement a sin tax on items containing high levels of sugar to address the current worldwide obesity epidemic. Consequently, sugar taxes have become increasingly popular. However, many sugar tax systems are implemented... -
Nutritional values and chemical composition of tropical pastures as potential sources of α-tocopherol and condensed tannin
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jalise F Tontini --- Graduate Program in Animal Science, Agronomy College, Brazil Cesar HEC Poli --- Graduate Program in Animal Science, Agronomy College, Brazil Viviane S Hampel --- Graduate Program in Animal Science, Agronomy College, Brazil Alessandro P Minho --- Embrapa Southeast Livestock, Brazilian Agricultural Research Corporation, Ministry of Agriculture, Brazil James P Muir --- Texas AgriLife Research, USATropical pastures can be important natural sources of antioxidant compounds and may impact production and quality of animal protein with repercussions on human health. The objective of this study was to evaluate the concentrations of α-tocopherol, condensed tannin (CT) and... -
The firm’s asset volatility, effective tax rate and leverage effect: Evidence from Taiwan
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: An-Sing Chen --- Department of Finance, Taiwan Pham Tuan Anh --- National Chung Cheng University, Taiwan and Nguyen Tat Thanh University, VietnamThis paper examines firms’ asset volatility across a broad cross-section of publicly traded Taiwanese listed nonfinancial firms and its relationship with effective tax rate and equity volatility under the capital structure framework. By analysing the leverage effect hypothesis of firms... -
“Left behind”: why implementing migration-aware responses to HIV for migrant farm workers is a priority for South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Thea de Gruchy --- The African Centre for Migration & Society, South Africa Jo Vearey --- The African Centre for Migration & Society, South AfricaLike many other countries, South Africa (SA) has committed to the Sustainable Development Goals that aim to “leave no-one behind”, in efforts towards universal health coverage, and meeting the UNAIDS 90–90–90 targets through the implementation of universal test and treat... -
Comparing beverage consumption, physical activity and anthropometry among young adult urban- and rural-dwelling African women
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Philippe Jean-Luc Gradidge --- Centre for Exercise Science and Sports Medicine, Faculty of Health Sciences, South Africa Herculina Salome Kruger --- Centre of Excellence for Nutrition, South AfricaBeverage consumption, physical activity, body mass index and waist circumference were compared in age-matched (aged 18–30 years) groups of young South African women from urban (n = 78) and rural (n = 94) settings. Obesity was higher in the rural group, driven by a... -
Optimization of the production and storage of cold in a mechanical compression solar refrigerator
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Adingra Paul Arsène Kouassi --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Siaka Touré --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’Ivoire Wanignon Ferdinand Fassinou --- Laboratoire d’Energie Solaire, Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie, Côte d’IvoireDesign, optimization and realization of high-performance photovoltaic systems are topical issues. Especially in photovoltaic solar refrigeration machines, the cost and the lifetime of electrochemical batteries limit the development of these systems in places well served by solar radiation. The objective... -
Revegetation of marginal saline rangelands of southern Tunisia using pastoral halophytes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abderrazak Tlili --- , Tunisia Emna Ghanmi --- , Tunisia Naziha Ayeb --- , Tunisia Mounir Louhaichi --- , Jordan Mohamed Neffati --- , Tunisia Mohamed Tarhouni --- , TunisiaRevegetation of marginalised rangelands using pastoral halophytes is considered an appropriate scientific and environmental approach to rehabilitation. Atriplex halimus L. (Amaranthaceae), A. mollis Desf. (Amaranthaceae), Cenchrus ciliaris L. (Poaceae) and Lotus creticus L. (Fabaceae) are promising species for arid rangeland... -
Methods of storing cactus pear genotypes for animal feeding
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Chrislanne Barreira de Macêdo Carvalho --- , Brazil Ricardo Loiola Edvan --- , Brazil Keuven dos Santos Nascimento --- , Brazil Romilda Rodrigues do Nascimento --- , Brazil Leilson Rocha Bezerra --- , Brazil Darkle Luiza de Souza Jácome --- , Brazil Viviany Lúcia Fernandes dos Santos --- , Brazil Hermógenes Almeida de Santana Júnior --- , BrazilThe objective of this study was to evaluate storage methods of cactus pear as a way of conservation for use in animal feeding. The randomised experimental design composed twelve treatments and three replications. Three cactus pear genotypes, Nopalea cochenillifera genotype... -
The value of rested sourveld in a communal grazing area in the Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lynton J Dedekind --- , South Africa Jon McCosh --- , South Africa Terry M Everson --- , South Africa Craig D Morris --- , South Africa Dayle Trotter --- , South AfricaThe potential for forage accumulated during periodic long rests to provide valuable winter grazing for livestock in heavily stocked communal rangelands in sourveld was assessed. In a continuously-grazed commonage at Ntshiqo in the Eastern Cape, South Africa, we measured seasonal... -
An unusual case of hypercholesterolaemia with liver dysfunction
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Zareena Angamia --- , South Africa Frederick J Raal --- , South AfricaAlthough rare, the presentation of the genetic disease spectrum associated with lysosomal acid lipase (LAL) deficiency, a disorder named cholesteryl ester storage disease (CESD) or the more severe form of Wolman's disease, is an important condition to recognise. LAL plays... -
Consumption of added sugars among undergraduate students at a South African university and its association with BMI
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Ra’eesah Nakhooda --- , South Africa Nicola Wiles --- , South AfricaObjectives: A study was undertaken to quantify added sugar intake; to show the association between added sugar intake and body mass index (BMI); and to identify determinants of added sugar and sugar-sweetened beverage (SSB) intake. -
Enhancing the food security status of yam (Dioscorea spp.) for smallholder farmers through an improved farm-gate storage structure in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Charles Tortoe --- , Ghana Solomon Dowuona --- , Ghana Paa Toah Akonor --- , Ghana Nanam Tay Dziedzoave --- , GhanaYams (Dioscorea spp.) are a good source of food in Ghana. This study investigated the storage of seven (7) key yam varieties in an improved farm-gate yam storage structure. Seven freshly harvested key yam varieties identified as Pona, Lariboko, Dente,... -
Financial slack, method of payment and acquirer performance: The case of cross-border acquisitions into Africa
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Chimwemwe Chipeta --- , South Africa Prince Nkiwane --- , South AfricaThis paper examines the influence of financial slack on the method of payment and financial performance of acquirers targeting African firms. Using panel data estimation techniques and controlling for, inter alia, firm and deal specific factors, we find no evidence... -
Patch-scale selection patterns of grazing herbivores in the central basalt plains of Kruger National Park
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Cyanne Young --- , South Africa Hervé Fritz --- , South Africa Erica AH Smithwick --- , United States of America Jan A Venter --- , South AfricaLarge herbivores form an essential component in the ecosystem, because of the impact that they have on their surrounding habitat. In this study, we aimed to evaluate some of the mechanisms behind how herbivores select forage at a patch scale... -
Shelf-life characteristics of Bambara groundnut (Vigna subterranea (L.)Verdc) probiotic beverage
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yvonne Yeukai Murevanhema --- , South Africa Victoria Adaora Jideani --- , South AfricaTwo Bambara groundnut probiotic beverages (BGNPB), fermented with (1) Lactobacillus bulgaricus and (2) Lactobacillus bulgaricus and Lactobacillus plantarum were assessed for their shelf-life characteristics. During the shelf-life study, sampling of the BGNPB was done at two-days interval for 28 days... -
The construction of “normative Zimbabweanness” through demonisation of rage, anger and emotion in select press coverage of the #ZimShutDown protests
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Kudzaiishe P. Vanyoro --- , South AfricaHashtagged #ZimShutDown on Twitter, protests erupted in Zimbabwe in January 2019 in response to a widespread national economic crisis and a drastic fuel price hike. This paper shows how the protesters’ use of citizen rage, anger and emotion was criminalised,... -
A reflection on the story, current positioning, offerings and the darker side of the luxury gastronomy book, the Michelin Guide
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Nguyen Vinh Hoa --- , France Isaure May --- , FranceThis article gives some personal reflections on the luxury status of the most famous gastronomic bible — The Michelin Guide. The question being addressed — Is the Guide still considered a luxurious commodity? By using secondary data, the findings show... -
Technico-economic comparison of heat transfer fluids or thermal energy storage materials: A case study using Jatropha curcas oil
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kokouvi Edem N’Tsoukpoe --- , Burkina Faso Nolwenn Le Pierrès --- , France Yao Manu Seshie --- , Burkina Faso Yézouma Coulibaly --- , Burkina FasoThermal oils are omnipresent in processes using heat at high temperature as heat transfer fluids (HTFs) as well as thermal storage materials (TESMs), particularly in concentrating solar plants. In this study, a methodology for technico-economic comparison of HTF and TESM... -
Statistical arbitrage on the JSE based on partial co-integration
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: A. J. Hoffman --- , South AfricaEarly forms of statistical arbitrage exploited the mean reversion of a model error extracted from pairs of instruments with a tendency to move together. Pairs trading was extended by Engle and Granger and by Johansen to include several co-integrated instruments... -
Potentials of leys or pasture-based forage production in Nigeria
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Saheed Olaide Jimoh --- , China Yunusa Muhammad Ishiaku --- , Nigeria Tracy Burnett --- , United States Ahmed Adeyemi Amisu --- , Nigeria Rasheed Adekunle Adebayo --- , South AfricaFulani pastoralists are widely distributed across the six geographical zones of Nigeria and migrate from north to south in search of natural grazing lands at times of forage scarcity. This migration leads annually to resource use conflict and deadly attacks... -
Topo-edaphic environment and forestry plantation disturbance affect the distribution of grassland forage and non-forage resources, Maputaland, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: AP Starke --- , South Africa TG O’Connor --- , South Africa CS Everson --- , South AfricaGrasslands are integral to rural livelihoods in southern Africa, because they provide hydrological regulation services and a variety of plant resources, including livestock fodder, medicines, and food products. To ensure ongoing provision of these resources in rapidly developing rural landscapes,... -
Nutritional quality of Calobota sericea fodders. A preliminary assessment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois L Müller --- , South Africa Clement F Cupido --- , South Africa M Igshaan Samuels --- , South AfricaThis study aimed to provide preliminary information regarding the nutritional quality of Calobota sericea, a preferred perennial legume forage species from the water-limited rangelands of South Africa. Calobota sericea plant samples were collected from the Namaqualand rangelands in the wet... -
Trends in ethylene management strategies: towards mitigating postharvest losses along the South African value chain of fresh produce – a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Bongolwethu P Mabusela --- , South Africa Zinash A Belay --- , South Africa Buntu Godongwana --- , South Africa Namrata Pathak --- , Germany Pramod V Mahajan --- , Germany Patricia M K Mathabe --- , South Africa Oluwafemi J Caleb --- , South AfricaThe management of ethylene during postharvest storage is of critical importance to fresh produce wholesalers and retailers. The management of ethylene is an important determinant of the quality and shelf life of fresh fruit and vegetables. Ethylene blocking action and... -
Artificial light improves productivity of mini-cuttings in a clonal minigarden of Eucalyptus benthamii and E. dunnii
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Enéas Ricardo Konzen --- , Brazil Natália Saudade de Aguiar --- , Brazil Marcio Carlos Navroski --- , Brazil Clenilso Sehnen Mota --- , Brazil Leticia Miranda --- , Brazil Regiane Abjaud Estopa --- , Brazil Erasmo Luis Tonett --- , Brazil Mariane de Oliveira Pereira --- , BrazilEucalypts are economically important worldwide, being largely propagated by clonal means, that is, frequently achieved by mini-cuttings. Regional climatic conditions, however, interfere with this strategy. Southern Brazil, especially in higher altitudes, has a considerable number of cloudy and cold days... -
Impact of rural, non-farm activities on smallholder farmers’ income-poverty in Eastern zone of Tigray Region, Ethiopia
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yohannes Halefom Gebrtetsadik --- , EthiopiaThis study aims at assessing the impact of rural, non-farm activities on smallholder farmers’ income-poverty. It answers these research questions: Is there any significant difference in the poverty indices between the participants and non-participants of non-farm activities? What is the... -
Adoption of dual-purpose sweetpotato varieties under partial population exposure in Rwanda: Insights from an African plant breeding programme
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gideon Danso-Abbeam --- , South Africa Lloyd J.S. Baiyegunhi --- , South Africa Mark D. Laing --- , South Africa Hussein Shimelis --- , South AfricaAs part of the Green Revolution, plant breeding programmes such as the African Centre for Crop Improvement have trained scientists to breed crop varieties in Africa to address the challenges of low productivity. However, exposure to and adoption of these... -
Support for local wines in The Netherlands: opportunities for the hospitality industry
Item type: Journal Article • Journal: Research in Hospitality Management • Authors: Joost Ijsselmuiden --- , The NetherlandsThis article reports on a research project to measure the current intrinsic competitive value of Dutch wine in comparison to wines from renowned wine countries based on a taste and olfactory evaluation, and to explore the sustainable benefits that local... -
Forage legumes from the Mediterranean Fynbos biome of South Africa with potential for domestication: slope aspect affects tissue fibre and mineral composition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Samson BM Chimphango --- , South Africa Luke H Gallant --- , South Africa M Igshaan Samuels --- , South Africa Odette E Curtis-Scott --- , South Africa A Muthama Muasya --- , South Africa Clement Cupido --- , South Africa James S Boatwright --- , South Africa John Howieson --- , AustraliaFabaceae plants contribute greatly to a high quality of pasture in rangelands, because of high levels of protein in their tissues. Despite this established importance, only a few southern African legumes have been evaluated for nutritional value and domestication. The... -
Application of intermittent warming to enhance postharvest quality and extend the shelf life of pomegranate fruit (Punica granatum)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Olaniyi Amos Fawole --- , South Africa Loriane Jennifer Ayo-ola Yanclo --- , South Africa Umezuruike Linus Opara --- , South AfricaIntermittent warming (IW) cycles slow down the physiology of fresh horticultural commodities, thereby extending their storage life. We investigated the effects of IW on physiological disorders, physicochemical, sensory parameters and the emission of volatile organic compounds (VOCs) of pomegranate (Punica... -
A Bat Hawk Macheiramphus alcinus pair preyed primarily on bats and birds that forage in clutter-edge and open-air habitat groups
Item type: Journal Article • Journal: African Zoology • Authors: G Malan --- , South Africa E Harris --- , South Africa T Harris --- , South Africa A Monadjem --- , EswatiniThis study aimed to analyse the diet of a pair of Bat Hawks Macheiramphus alcinus, based on regurgitated pellets, and the associated habitat-foraging groups that the prey species belonged to. A total of 908 regurgitated pellets were collected from underneath... -
Human resources and innovation capability: Evidences from Nigeria food and beverage firms
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Helen Olubunmi Aderemi --- Obafemi Awolowo University, Nigeria Victor Oluwasina Sobanke --- National Centre for Technology Management (NACETEM), Nigeria Matthew Olugbemiga Ilori --- Obafemi Awolowo University, NigeriaHuman resources are recognized as the ultimate and most indispensable resource in economic development. In this study, an inquiry was made to ascertain the determinants of workers’ innovativeness. A survey of 229 respondents in food and beverage processing firms selected... -
Assistance needed for the integration of orphaned and vulnerable children — views of South African family and community members
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Melvyn Freeman --- Social Aspects of HIV/AIDS and Health Research Programme of the HSRC, Nkululeko Nkomo --- Social Aspects of HIV/AIDS and Health Research Programme of the HSRC,Guardianship within families is often regarded as the most viable and preferred option for orphaned and vulnerable children (OVC). However, this will place a considerably increased burden on the new caregivers of these children. This study examines whether assistance to... -
The effects of temperature on oxygen consumption in the lizard Pseudocordylus melanotus from Suikerbosrand Nature Reserve
Item type: Journal Article • Journal: African Journal of Herpetology • Authors: Suzanne McConnachie --- , , South AfricaIn reptiles, metabolic rate (MR) is affected by many different factors, including temperature, sex, body size and digestive state. Standard MR was measured for the lizard Pseudocordylus melanotus over a range of temperatures (20, 22, 25, 30 and 32°C). I... -
Spatio-temporal status of vegetation, soil and cattle serum minerals in degraded communal rangelands of the Eastern Cape, South Africa: implications for livestock sustainability and management interventions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Nangamso Mlaza --- University of Fort Hare, South Africa Solomon Tefera --- University of Fort Hare, South Africa Abubeker Hassen --- University of Pretoria, South AfricaIn this study, we examined forage, soil and cattle serum mineral status, and their relationships in severely (SD) and less severely (LSD) degraded rangelands, South Africa. Such evidence is essential to inform rangeland policies and interventions. In each rangeland, three... -
Participatory inventory and nutritional evaluation of local forage resources for smallholder free-range beef production in semi-arid areas of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ayanda Nyambali --- University of Fort Hare, South Africa Julius T Tjelele --- Animal Production Institute, South Africa Mthunzi Mndela --- Animal Production Institute, South Africa Cletos Mapiye --- Stellenbosch University, South Africa Phillip Strydom --- Stellenbosch University, South Africa Emiliano Raffrenato --- Stellenbosch University, South Africa Kennedy Dzama --- Stellenbosch University, South Africa Voster Muchenje --- University of Fort Hare, South Africa Ntuthuko Mkhize --- Animal Production Institute, South AfricaFeed scarcity is a major challenge facing free-range beef farming in semi-arid areas. Specifically, low quality and quantity of forage in rangelands and higher feeding costs are the main constraints limiting smallholder free-range beef farmers’ participation in mainstream beef markets... -
Transhumance pastoralism in West Africa – its importance, policies and challenges
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Eric Cofie Timpong-Jones --- Livestock and Poultry Research Centre (LIPREC), University of Ghana, Ghana Igshaan Samuels --- University of the Western Cape, South Africa Felix Owusu Sarkwa --- Livestock and Poultry Research Centre (LIPREC), University of Ghana, Ghana Kwame Oppong-Anane --- Oporhu Agricultural and Rural Development Consultancy Ltd, Ghana Ayodele Oluwakemi Majekodumni --- Food and Agriculture Organization of the United Nations (FAO), NigeriaThe Economic Community of West African States (ECOWAS) recognises transhumance pastoralism as a beneficial livestock production system that can contribute to food security together with economic and political stability. Thus, the subregional bloc put together the ECOWAS Protocol on Transhumance... -
Average Hewitt-Stromberg and box dimensions of typical compact metric spaces
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Bilel Selmi --- University of Monastir, TunisiaThe main aim of this paper is to study average Hewitt-Stromberg and box dimensions of typical compact metric spaces belonging to the Gromov-Hausdorff space equipped with the Gromov-Hausdorff metric. -
Blow-up of solutions for a wave equation with nonlinear averaged damping and nonlocal nonlinear source terms
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Qingying Hu --- Henan University of Technology, China Donghao Li --- Henan University of Technology, China Shuo Liu --- Henan University of Technology, China Hongwei Zhang --- Henan University of Technology, ChinaThe initial-boundary value problem for a wave equation with nonlinear averaged damping and nonlocal nonlinear source term is considered. We provide the sufficient conditions of finite time blow-up for weak solutions with suitable conditions on initial data by an ordinary... -
Nonlinear dependencies in the Fama and French three-factor model
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Jakub Bandurski --- University of Warsaw, Poland Łukasz Postek --- University of Warsaw, PolandThis article addresses the topic of nonlinear dependencies in the Fama and French three-factor model. Five time-series models, including nonlinear terms, are assessed using US and European data and compared with a benchmark linear model. The analysis found that nonlinear... -
Genetic analysis of Panicum coloratum var. makarikariense caryopsis retention
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: María FM Lirusso --- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, Argentina Florencia I Pozzi --- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, Argentina Guillermo R Pratta --- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, Argentina Silvina A Felitti --- Instituto de Investigaciones en Ciencias Agrarias de Rosario, Universidad Nacional de Rosario, ArgentinaPanicum coloratum is a species of C4 type grass native to South Africa. In Argentina, it is valued for its production of good quality forage in environments where resources are limiting, although it is infrequently cultivated in livestock systems. The... -
Bromatological and histological features of native African grasses under grazing in Brazilian semi-arid rangelands
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Talita Roberta Firemand de Lira Menor --- Universidade Federal Rural de Pernambuco, Brazil Mércia Virginia Ferreira dos Santos --- Universidade Federal Rural de Pernambuco, Brazil Janerson José Coêlho --- Universidade Federal Rural de Pernambuco, Brazil Geane Dias Gonçalves --- Universidade Federal Rural de Pernambuco, Brazil Alexandre Carneiro Leão de Mello --- Universidade Federal Rural de Pernambuco, Brazil Márcio Vieira da Cunha --- Universidade Federal Rural de Pernambuco, Brazil Amanda Maria Gallindo dos Santos --- Universidade Federal Rural de Pernambuco, Brazil Ivan Ferraz --- Instituto Agronômico de Pernambuco, Brazil José Carlos Batista Dubeux Júnior --- University of Florida, United StatesThis study evaluated the bromatological and histological features of native African grasses under grazing in Brazilian semi-arid rangelands. An experimental grid design was used in a randomised sampling method for four replicate samples of three African grasses. The grasses evaluated... -
A generalization of Taketa’s theorem on M-groups
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Zeinab Akhlaghi --- Amirkabir University of Technology (Tehran Polytechnic), IranLet G be a finite group. We prove the solvability of G, by assuming that the average degree of non-monomial irreducible characters in Irr(G) is less than 5/2. The bound is sharp. -
Nutritional quality of Calobota sericea fodders harvested at different phenological stages – opportunities for inclusion in fodder flow programs for extensive livestock farmers
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Ethan A Britz --- , South Africa Lilburne F Cyster --- University of the Western Cape, South Africa Clement F Cupido --- , South Africa M Igshaan Samuels --- , South Africa Thamsanqa DE Mpanza --- , South Africa Francuois L Müller --- , South AfricaCalobota sericea (Thunb.) Boatwr. & B.-E.van Wyk (Fabaceae) is a native legume from the semi-arid rangelands of South Africa. The species has been prioritised as a forage for water-limited agro-ecological areas. No information regarding the nutritional quality of C. sericea... -
Seedling establishment and early growth in Calobota sericea subjected to moisture stress
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- , South Africa Letty Masemola --- , South Africa Stephen Modiba --- , South Africa Nothando Ngcobo --- , South AfricaThe South African perennial legume Calobota sericea (Thunb.) Boatwr. & B-E van Wyk has been shown to be drought tolerant as mature plants, but information on drought tolerance of seedlings is lacking. This study evaluated the impact of moisture stress... -
Histological arrangements of plant tissue of different elephant grasses as influenced by their genotypes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, Brazil --- Universidade Federal Rural de Pernambuco, BrazilElephant grass genotypes display a variety of morphological differences, influencing the nutritive value of the forage. This study evaluated the histological arrangements of the leaves and stems of different elephant-grass genotypes, two tall-sized (Elephant B and IRI-381) and two dwarfs... -
Nutritional properties and in vitro gas production in cactus pear (Opuntia stricta) and cassava (Manihot esculenta) shoot silages
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Vale do São Francisco, Brazil --- Universidade Estadual do Sudoeste da Bahia, Brazil --- Universidade Federal do Tocantins, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- Universidade Federal do Agreste de Pernambuco, Brazil --- , Brazil --- Universidade Federal do Maranhão, Brazil --- Universidade Federal do Vale do São Francisco, BrazilThis study evaluated the effects of different inclusion levels of cactus pear (Opuntia stricta) (at 0%, 15%, 30% or 45% on fresh matter basis) ensiled with shoots of cassava (Manihot esculenta) on the mineral nutrients, carbohydrates fractionation, nitrogen compounds and... -
Effect of plant spacing and cutting intensity on the morphology and productivity of forage cactus [Opuntia stricta (Haw.) Haw.]
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Claudia Maciel Ferreira --- Universidade Federal Rural de Pernambuco, Brazil Marcio Vieira da Cunha --- Universidade Federal Rural de Pernambuco, Brazil Mércia Virginia Ferreira dos Santos --- Universidade Federal Rural de Pernambuco, Brazil Alexandre Carneiro Leão de Mello --- Universidade Federal Rural de Pernambuco, Brazil Djalma Cordeiro dos Santos --- Instituto Agronômico de Pernambuco, Brazil Maria da Conceição Silva --- Instituto Agronômico de Pernambuco, Brazil Janerson José Coelho --- Universidade Federal Rural de Pernambuco, BrazilThe forage cactus cultivar Mexican elephant ear (MEE) [Opuntia stricta (Haw.) Haw.] has been widely used in the semi-arid of Brazil because of its resistance to carmine mealybug. Therefore, it is necessary to establish planting and harvesting management strategies for... -
Herbage intake and performance of grazing lambs in tropical erect grass pastures maintained at different heights
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lívia Raymundo Irigoyen --- Federal University of Rio Grande do Sul, Brazil Cesar Henrique Espírito Candal Poli --- Federal University of Rio Grande do Sul, Brazil Gladis Ferreira Corrêa --- Federal University of Pampa, Brazil Jalise Fabíola Tontini --- Federal University of Rio Grande do Sul, Brazil Ignacio Fernando López --- Massey University, New Zealand Joseane Anjos da Silva --- Federal University of Rio Grande do Sul, BrazilOne of the main constraints for sheep production in tropical and subtropical areas is the lack of knowledge of how to manage erect tropical grasses for lambs. The objective of this study was to assess the effect of pasture height... -
Evaluation of in situ and ex situ forage germplasm collections reveals the first occurrence and seed-transmission of alfalfa mosaic virus and southern bean mosaic virus in Urochloa species
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Woubit Dawit --- International Livestock Research Institute (ILRI), Ethiopia Fikerte Mulatu --- International Livestock Research Institute (ILRI), Ethiopia Yesuf Eshete --- International Livestock Research Institute (ILRI), Ethiopia Alemayehu Teressa Negawo --- International Livestock Research Institute (ILRI), Ethiopia Alok Kumar --- Haramaya University, Ethiopia Alice Muchugi --- International Livestock Research Institute (ILRI), Ethiopia Chris Stephen Jones --- International Livestock Research Institute (ILRI), KenyaGrasses of the genus Urochloa (Urochloa species syn. Brachiaria species) are among the most important tropical forage grasses of African origin. The International Livestock Research Institute (ILRI) Forage Genebank maintains 671 Urochloa grass accessions, belonging to 28 species, of which... -
Diet preference of black rhinoceros Diceros bicornis at Welgevonden Game Reserve, South Africa, across seasons
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Joti Daya --- Nelson Mandela University – George Campus, South Africa Hervé Fritz --- Nelson Mandela University – George Campus, South Africa Jan A Venter --- Nelson Mandela University – George Campus, South AfricaDiet preference of the black rhinoceros Diceros bicornis was determined in Welgevonden Game Reserve (WGR), located in the Waterberg region of Limpopo Province, South Africa. Fieldwork was conducted in the dry, early wet and late wet seasons. Diet preference was... -
Fermentation characteristics of maize–forage legume mixtures ensiled in small-scale silos
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PE Mosebi --- University of Pretoria, South Africa IC Madakadze --- University of Pretoria, South Africa MP Ntakatsane --- National University of Lesotho, Lesotho R Ratsele --- , LesothoThis study was conducted to evaluate the ensiling characteristics of maize–forage legume mixtures in small-scale silos. Sole and intercrops forage materials were harvested 80 days after planting and ensiled in small-scale silos, that is: plastic bags, plastic drums, and small... -
Does sugar taxation on sugar-sweetened beverages alter purchasing behaviour of South African consumers? Perspectives of dietitians and key industry role-players
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Yolande Smit --- Stellenbosch University, South Africa Zarina Ebrahim --- Stellenbosch University, South Africa Maritha Marais --- Stellenbosch University, South Africa Daan Nel --- Centre for Statistical Consultation, Stellenbosch University, South Africa Nelene Koen --- Stellenbosch University, South Africa -
Cape genet Genetta tigrina diet in the Albany Thicket Biome, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Axola Plaatjie --- University of Fort Hare, South Africa Filipe Carvalho --- University of Fort Hare, South Africa Rabelani Marikhele --- University of the Witwatersrand, South Africa Zimkitha JK Madikiza --- University of the Witwatersrand, South Africa Emmanuel Do Linh San --- University of Fort Hare, South AfricaThe diet of the Cape genet Genetta tigrina is only well known in the coastal forests of South Africa, where either arthropods or small mammals are their dominant prey. Here, we aimed to demonstrate this species’ opportunistic behaviour by investigating... -
Influence of different temperatures on seedling growth and development of Calobota sericea, a semi-arid rangeland species of South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Francuois Müller --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Letty Masemola --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Fortune Manganyi --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South Africa Nothando Ngcobo --- Agricultural Research Council – Animal Production Institute, South African National Forage Genebank, South AfricaThis study determined how temperature affected the early growth of seedlings of Calobota sericea (Thunb.) Boatwr. & B.-E.van Wyk. One-month-old C. sericea seedlings were grown at constant temperatures of 2.5, 5, 10 and 20 °C for 30 days. After 30... -
Characterizing some finite groups by the average order
Item type: Journal Article • Journal: Quaestiones Mathematicae • Authors: Z. Akhlaghi --- Amirkabir University of Technology (Tehran Polytechnic), Iran Behrooz Khosravi --- Amirkabir University of Technology (Tehran Polytechnic), Iran Ashkan ZareZadeh --- Amirkabir University of Technology (Tehran Polytechnic), IranThe average order of a finite group G is denoted by o(G). In this note, we classify groups whose average orders are less than o(S 4), where S 4 is the symmetric group on four elements. Moreover, we prove that... -
Do changes in star selection criteria affect analyst behaviour?
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Karam Kim --- Sungkyunkwan University, Republic of Korea Doojin Ryu --- Sungkyunkwan University, Republic of Korea Jinyoung Yu --- Xi'an Jiaotong-Liverpool University, ChinaThis study examines whether the star analyst selection criteria affect analysts’ coverage decisions and the informativeness of their reports. We focus on a change to the star evaluation criteria that increased the importance of quantitative standards. After the reform, analysts... -
Over half of South African beverages will require warning labels for high sugar and/or artificial sweeteners
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Wantonda Mukhovha --- University of the Witwatersrand, South Africa Naledi Sibiya --- University of the Witwatersrand, South Africa Thanujj Kisten --- University of the Witwatersrand, South Africa Molatela K Mamabolo --- University of the Witwatersrand, South Africa Siphiwe N Dlamini --- University of the Witwatersrand, South AfricaObjective: To determine the proportion of commercially available beverages that may require warning labels for high sugar content and the presence of artificial sweeteners in South Africa. -
The spillover and leverage effects and trading volume of FinTech Exchange-Traded Funds
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Sabbor Hussain --- Chung Yuan Christian University, Taiwan Jo-Hui Chen --- Department of Finance, Chung Yuan Christian University, TaiwanThis paper explores the spillover and leverage effects, as well as trading volume dynamics, of Financial, Technology, and FinTech Exchange-Traded Funds (ETFs) using ARMA-GARCH and ARMA-EGARCH models. The study indicates that these ETF sectors and the stock market index have... -
Techno-economic and environmental assessment of battery integrated wind farm siting across offshore Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gbubemi Kevin Akporhonor --- Energy and Environment Cranfield University, United KingdomThis study investigates the economic, technical, and environmental impacts of integrating a battery energy storage system (BESS) with an offshore wind farm near Koko Sea Port, Nigeria. As renewable energy curtailment increases and Nigeria’s energy demand grows, energy storage systems... -
Sugar-sweetened beverage intake and anthropometric profile of grade 6 learners in the Nelson Mandela Bay area, South Africa: a mixed-methods study
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Candice Stansbury --- Stellenbosch University, South Africa Zarina Ebrahim --- Stellenbosch University, South Africa Daniel Nel --- Stellenbosch University, South Africa Penelope Love --- Deakin University, Australia Yolande Smit --- Stellenbosch University, South AfricaBackground: A paucity of data exists regarding the intake of sugar-sweetened beverages (SSBs) among children and the prevalence of childhood overweight and obesity in the Nelson Mandela Bay area in South Africa (SA). -
Frequent defoliation rapidly and progressively reduces the vigour of a perennial mesic grassland forb, Thunbergia atriplicifolia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- University of KwaZulu-Natal, South Africa Sindiso Nkuna --- University of KwaZulu-Natal, South AfricaForbs in South African mesic grasslands are ancient, numerous, and diverse, thriving with fires and light herbivory but declining under chronic, severe grazing and trampling. This study tested the hypothesis that repeated herbivory progressively weakens forbs by reducing their underground... -
Does spring defoliation affect energy reserves in a South African mesic grassland geophyte?
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Craig D Morris --- c/o School of Life Sciences, University of KwaZulu-Natal, South Africa Sindiso Nkuna --- School of Life Sciences, University of KwaZulu-Natal, South AfricaOvergrazing reduces the abundance of mesic grassland forbs, including geophytes. The potential negative effect of spring grazing, aimed at exploiting high-quality grass forage, on energy reserves in underground storage organs (USOs) of a mesic grassland geophyte, Merwilla plumbea (Lindl.) Speta,... -
11. Sugar and health: a food-based dietary guideline for South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Temple NJ --- Centre for Science, Athabasca University, Canada Steyn NP --- Knowledge Systems, Human Sciences Research Council,The intake of added sugar appears to be increasing steadily across the South African population. Children typically consume approximately 40-60 g/day, possibly rising to as much as 100 g/day in adolescents. This represents roughly 5-10% of dietary energy, but could... -
Modelling users’ intention to migrate from free to premium personal cloud storage in freemium business models: A machine learning approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: John Oredo --- Department of Library and Information Science, University of Nairobi,Extant technology post-adoption studies focus on effective and continued use. The current study models the features that explain and predict users’ intention to migrate from free to premium cloud storage services. Data were collected from 122 postgraduate students on perceived... -
Acceptance, availability, and accessibility of reformulated sugar-sweetened beverages in Pietermaritzburg, KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Nikita Baijnath --- University of KwaZulu-Natal, South Africa Kirthee Pillay --- University of KwaZulu-Natal, South Africa Nicola Wiles --- University of KwaZulu-Natal, South Africa -
Universal Health Service Coverage under threat? A study of the effects of PEPFAR HIV funding on UHC
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Lazarus Muchabaiwa --- UNAIDS, Kenya Charles Birungi --- UNAIDS, Kenya Melissa Sobers --- UNAIDS, Kenya Jaime Atienza Azcona --- UNAIDS, SwitzerlandIntroduction: While the effects of the US government’s sudden pause of foreign aid on the global HIV response have been well documented, little is known about the likely impact on universal health coverage (UHC) in recipient countries. This study assesses... -
Exploring SDG 2 disclosure of South African food and beverage companies
Item type: Journal Article • Journal: South African Journal of Accounting Research • Authors: Elizma Booysen --- Management Cybernetics research niche area, North-West University, South Africa Susanna L Middelberg --- Management Cybernetics research niche area, North-West University, South Africa Nadia Gulko --- University of Lincoln, UK -
Arbitrage opportunities in no-arbitrage portfolios: The case of Bitcoin and Treasury Bills
Item type: Journal Article • Journal: Investment Analysts Journal • Authors: Wing-Keung Wong --- Asia University, Taiwan Zhenzhen Zhu --- School of Statistics and Mathematics, Shandong University of Finance and Economics, China I-Ming Jiang --- College of Management, Yuan Ze University, Taiwan Elie Bouri --- Lebanese American University, LebanonEmploying both mean-variance portfolio optimization and stochastic dominance analysis, we examine whether including Bitcoin and 3-month US Treasury Bills could generate arbitrage opportunities and lead to better investment choices. The results show, independent of whether short sales are allowed, that:... -
Cape Gannet Morus capensis year-round presence off the southern Cape coast of South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Zanri Strydom --- , South Africa Tiaan Strydom --- , South AfricaThe year-round presence and abundance of Cape Gannets Morus capensis in the greater Wilderness waters (Western Cape, South Africa) were monitored through a land-based observational study, 330 km (straight-line distance) from the nearest breeding colony, Bird Island Algoa Bay. Between... -
Sustainable intensification in rangelands of the southernmost region of Chile
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Raúl J Lira Fernandez --- Instituto de Investigaciones Agropecuarias, Centro Regional de Investigación Kampenaike, Chile Andres F Cibils --- Livestock, Forage and Pasture Management Research Unit, USDA ARS OCPARC, USARangeland-based sheep ranching has shaped the agricultural economy of Chile’s southernmost grasslands for over a century and a half. Ranching systems in the region, established in the late 1800s, transitioned from large European corporate enterprises, common until the mid-20th century,... -
Grazing smarter: science-based grazing strategies, not only stocking rate, determine rangeland outcomes
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Richard Fynn --- Okavango Research Institute, University of Botswana, Botswana Kevin Kirkman --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa Craig Morris --- School of Agriculture and Science, University of KwaZulu-Natal, South Africa Peter Zacharias --- Consultant in Vegetation/Animal Systems, South AfricaResearch indicates a ‘crisis’ in the search for optimal grazing strategies with experimental results suggesting that stocking rate is the primary factor influencing rangeland condition and cattle performance. However, we contend that this is a spurious conclusion, inevitably conceived by... -
Life-history traits of the false jacopever Sebastes capensis (Scorpaenidae: Sebastinae) in South African waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: T Mohamed --- Department of Biological Sciences, University of Cape Town, South Africa CG Attwood --- Department of Biological Sciences, University of Cape Town, South AfricaThe genus Sebastes (rockfishes) of family Scorpaenidae (scorpionfishes) contains over 110 species, of which the false jacopever Sebastes capensis is the only one found in South African waters. Although it is a commonly caught linefish along the west coast of... -
Seasonal consumption of Thamnochortus spicigerus (Restionaceae) by eland is associated with plant sex and nutrient status
Item type: Journal Article • Journal: African Zoology • Authors: Petro Botha --- Department of Botany and Zoology, Stellenbosch University, South Africa Bruce Anderson --- Department of Botany and Zoology, Stellenbosch University, South AfricaHistoric distributions of large herbivores in the Fynbos Biome remain poorly described and, despite ongoing reintroductions, their dietary strategies and forage selection in the Fynbos Biome are understudied. We monitored an introduction of eland into Cape Flats Dune Strandveld vegetation,...
