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Litterfall and Nutrient Release in Mature Pinus radiata in the South-western Cape
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Division of Forest Science and Technology, CSIR, Jonkershoek F.R.C., D. G.M. Donald --- Faculty of Forestry,Fast-growing plantations of conifers have replaced areas of mediterranean shrubland in the south-western Cape. This study arises from the need to quantify the impacts of major changes in primary productivity, litterfall, and nutrient cycling in terms of the site utilisation... -
Evidence of Induced Nutrient Deficiency in Pine Plantings on Previously Cropped Lands
Item type: Journal Article • Journal: South African Forestry Journal • Authors: A.W. Schumann --- , South Africa A.D. Noble --- , South AfricaWidespread establishment failures of Pinus species have recently occurred on agricultural land acquired for commercial forestry in South Africa. These include about 10 000 ha of previously tilled soils in the north-eastern Cape belonging to Mondi Forests. A lettuce (Lactuca... -
The effect of stocking rate and lick supplementation on the performance of lactating beef cows and its impact on Highland Sourveld
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Van Niekerk --- Department of Agriculture (Natal Region), M.B. Hardy --- Department of Agriculture (Natal Region), B.D. Mappledoram --- Department of Agriculture (Natal Region), S.F. Lesch --- Department of Agriculture (Natal Region),The Highland Sourveld of Natal is an important beef producing area. Although it covers only 13% of the total area of the province, it supports 18% of the beef cattle population. -
Nutrition of intensive pastures in the summer rainfall areas of southern Africa
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Miles --- Department of Agricultural Development, Republic of South AfricaConsideration is given to the current state of knowledge regarding the nutrition of cultivated pastures in the summer rainfall areas of southern Africa. Research efforts over the years have concentrated on the nitrogen (N) requirements of pastures, with relatively little... -
Seasonal changes in nutrient content under three defoliation treatments in two coastal grassland communities of Transkei
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.M. Shackleton --- Department of Botany, Transkei M.T. Mentis --- Department of Botany, Republic of South AfricaChanges in nutrient concentrations were monitored over a two‐year period in two coastal grassland communities. Dry matter digestibility, crude protein, phosphorus, potassium, calcium and magnesium were determined from hand‐clipped samples of experimental treatments; namely, burning with and without subsequent grazing... -
Effect of nutrient calcium on the cell wall composition and digestibility of kikuyu grass (Pennisetum clandestinum Hochst)
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.P. Marais --- , Republic of South Africa D.L. Figenschou --- , Republic of South Africa Maria de Figueiredo --- , Republic of South AfricaThe effect of calcium in the nutrient medium on kikuyu grass (Pennisetum clandestinum Hochst), grown in a solution culture, was investigated. Calcium had no effect on the lignin content of leaf material, but decreased the lignin content per unit stem... -
Measurement of exchangeable aluminium in soils and clay minerals by isotopic exchange
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. A.G. Kotzé --- , Marlise Joubert --- , Johannes.F. de Villiers --- , M. van der Westhuizen --- , D. van der Bank --- ,Isotopically exchangeable Al was determined in soils and clay minerals by equilibration with 28Al. Best results were obtained with a weak extractant and an equilibration time of eight min. The calculated amount of isotopically exchangeable Al was independent of the... -
Physical and clay mineralogical properties of some Natal and eastern Transvaal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Cass --- , Australia M.A. Johnston --- Department of Agriculture and Water Supply,Soils, collected from the south-eastern Transvaal, Natal north coast and the more arid areas of the Natal interior, were examined using physical, chemical and mineralogical methods. Most of the soils were associated with particular management problems such as poor internal... -
Kleimineralogie, katioonuitruilkapasiteit en waterhouvermoë van grondvorms in die Hoëveldstreek
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AstridM. Hattingh --- Hoëveldstreek, Departement van Landbou en Watervoorsiening,Kleimineralogiese data vir 12 grondvorms, wat algemeen in die Hoëveldstreek voorkom, is ondersoek. Die persentasie monsters waarin 'n bepaalde kleimineraal voorkom, is bereken. Daaruit is dit duidelik dat smektiet algemeen in gronde van die Arcadia-, Bonheim, en Rensburgvorms voorkom, maar... -
Rapid simultaneous rating of soil texture, organic matter, total nitrogen and nitrogen mineralization potential by near infra-red reflectance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.H. Meyer --- , Republic of South AfricaA rapid non-destructive technique for the determination of various soil properties by near infra-red spectrophotometry is described. Over 100 soils, of which the organic matter content, total nitrogen (N) content, N-mineralizing potential and particle size distribution were known, were used... -
The effect of lime, KCl and parent material on the cation exchange capacity of some acid subsoils of the western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South AfricaCation exchange capacity (CEC) values obtained by 22Na dilution for a number of mineralogically diverse acid subsoils reflected positive responses to lime and to treatment with KCl such that: CEC (unlimed, no KCl) < (unlimed + KCl) < (limed, no... -
Loss of nitrogen fertility and its restoration in some Orange Free State soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Prinsloo --- Department of Soil Science, Republic of South Africa G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThe effects of present or past cultivation on nitrogen fertility in some central Orange Free State soils were investigated by the comparison of paired samples of cultivated or reverted soils with uncultivated soils situated as closely as possible to one... -
Effect of liming and parent material on the potassium quantity/intensity relationships of some upland soils of the western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South AfricaLiming and parent material had major effects on the potassium (K) quantity/intensity (Q/l) relationships of a varied group of naturally base-depleted upland soils of the western Cape. Departures from the usual Q/l curve form were observed, the individual curve sections... -
Alternative rest-breaking agents to DNOC/oil for apples
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.S. North --- , Republic of South AfricaRest-breaking agents less toxic than the commercially-used DNOC/winter-oil and less expensive than hydrogen cyana- mide were tested on Golden Delicious in a high density planting in a region of warm winters. Some combinations of mineral oil and cyanamide were as... -
Long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaSustainable farming in the semi-arid interior of South Africa requires the adoption of conservation practices to maintain and, if possible, increase soil fertility. The effects of some such practices on the nitrogen fertility of a hydromorphic sandy clay loam soil... -
Measurements of mineralization, nitrification and denitrification in laboratory incubations of soil from a semi-arid natural grassland
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du preez --- Department of Soil Science, Republic of South AfricaExperiments were done to compare three incubation methods after it was found that prolonged incubation of soil in sealed preserving jars resulted in the exhaustion of head- space oxygen and anaerobiosis in the soil. Nitrate added to soil from the... -
Effects of sample drying temperature on indices of available nitrogen in soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.H. Wiltshire --- Department of Soil Science, Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaDuring a field trial investigation into the long-term effects of conservation practices on the nitrogen fertility of a soil cropped annually to wheat, it was observed that sample preparation had an effect on some indices of available nitrogen. The trial... -
The effect of crop rotation with wheat and oats on the incidence of Fusarium crown rot of wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O. Los --- , Republic of South Africa S.W. Baard --- Department of Plant Pathology, Republic of South Africa W. F.O. Marasas --- Medical Research Council, Republic of South Africa S.A. Burgers --- , Republic of South AfricaCrown rot is a serious disease of wheat in the central and western parts of the Orange Free State. The disease, caused mainly by Fusarium graminearum Group 1, is difficult to control and crop rotation has been suggested as a... -
Swawelfraksies, -verhoudings en -verwantskappe in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. du Toit --- , Republiek van Suid-Afrika C.C. du Preez --- Departement Grondkunde, Republiek van Suid-AfrikaDie negatiewe invloed van bewerking op organiese materiaal in gronde en 'n groot afname in die eksterne insette van S het die vraag laat ontstaan of die swawelstatus van Suid-Afrikaanse gronde voldoende is om volhoubare gewasproduksie te verseker. Bewerkte en... -
Effect of cultivation on the nitrogen fertility of selected dryland soils in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. du Toit --- , Republic of South Africa C.C. du Preez --- Department of Soil Science, Republic of South AfricaThis study is part of an investigation into the effect of cultivation on the organic matter content of topsoils (0 - 200 mm) from commercial farms practising dryland agriculture in the summer rainfall area of South Africa (24°-30°S; 24°-30°E). The... -
Evaluation of an undisturbed-soil incubation method as an index of soil nitrogen availability in a limed and non-limed soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P.J. Raath --- , Republic of South Africa D. Saayman --- Department of Soil and Agricultural Water Science, Republic of South AfricaNitrogen mineralization potentials were determined using an undisturbed-soil incubation procedure. The purpose of this study was to evaluate the above-mentioned method as an index of soil nitrogen availability. Undisturbed soil samples (0–150 and 150–300 mm) of a limed (pH 7.3)... -
Fosfor in geselekteerde onversteurde en bewerkte Suid-Afrikaanse gronde 2. Anorganiese en organiese fosforfraksies
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.J. van Zyl --- Departement Grondkunde, Republiek van Suid-Afrika C.C. du Pree --- Departement Grondkunde, Republiek van Suid-AfrikaDaar is voorheen vasgestel dat gewasverbouing die anorganiese (Pa) en organiese (Po) fosforinhoud van gronde vanaf die somerreënvalgebied (25°-30° S; 24°-30° O) in Suid-Afrika beïnvloed het. Dus kan die Pa- en Po-fraksies, wat in planttoeganklikheid varieer, ook moontlik beïnvloed word... -
Water-holding capacity of rock fragments in rehabilitated opencast mine soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.L. Schoeman --- , South Africa M.M. Kruger --- , South Africa A.H. Loock --- , South AfricaThe water-holding capacity of rock fragments sampled from spoil materials underlying rehabilitated opencast coal mine soils was determined. Four rock types, ranging from grit and coarse sandstone to carbonaceous shale, and four fractions of different size were investigated by means... -
An investigation into the problems associated with revegetating chrysotile tailings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- , Republic of South Africa L. Pistoruis --- , Republic of South AfricaThe present investigation was initiated because of the limited success achieved in the past at attempts to revegetate chrysotile tailings with their associated inherent environmental risk factors. The current set of experiments and surveys, as with several previous studies, were... -
A comparison of head infection and blight development caused by Fusarium graminearum and Fusarium crookwellense in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: W. H.P. Boshoff --- Department of Plant Pathology, Republic of South Africa Z.A. Pretorius --- Department of Plant Pathology, Republic of South Africa W.J. Swart --- Department of Plant Pathology, Republic of South AfricaThe objectives of this study were to compare the infection of wheat heads by Fusarium graminearum and F. crookwellense and to determine the effect of temperature on head blight development induced by these species. Scanning electron microscopy of spikes of... -
Using Ground Penetrating Radar to investigate spoil layers in rehabilitated minesoils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.G. Paterson --- , Republic of South Africa M.C. Laker --- Department of Plant Production and Soil Science, Republic of South AfricaOpencast coal mining on the Highveld of Mpumalanga involves the disturbance of highly productive soils, which must then be rehabilitated on top of the mined spoil. Various problems in this process may occur, however, which may lead to water-logging, compaction... -
The response of Lolium multiflorum (Lam.) to applied phosphorus and potassium on a cricket pitch clay
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N.M. Tainton --- Department of Range and Forage Resources, Republic of South Africa J.R. Klug --- Department of Range and Forage Resources, Republic of South Africa N. Miles --- KwaZulu-Natal Department of Agriculture, Republic of South Africa C.D. Morris --- , Republic of South AfricaLolium multiflorum cv. Barmultra was used to evaluate the P and K status of plants grown on a smectitic soil commonly used for the construction of cricket pitches in the coastal regions of South Africa. Bulli was treated with P... -
Anatomical and compositional changes during fruit development of ‘Galia’ melons
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. J.J. Combrink --- Department of Agronomy, Republic of South Africa G.A. Agenbag --- Department of Agronomy, Republic of South Africa P. Langenhoven --- Department of Agronomy, Republic of South Africa G. Jacobs --- Department of Horticultural Science, Republic of South Africa E.M. Marais --- Department of Botany, Republic of South Africa‘Galia’ melons were grown under controlled conditions and pruned to bear two fruits with 19 leaves per plant. Leaves and fruits were sampled and analysed at eight different stages. Pericarp cell division and enlargement occurred during the first week after... -
Clay-substrate application to sandy open-cast mine soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G. Reuter --- Department of Soil Science and Plant Nutrition, GermanyThe review gives some insight into the objective of amelioration to improve fertility of sandy soils. The research concept is based on the high water and cation exchange capacity of clay minerals. Technological and economic problems as well as practicable... -
Reaction of South African spring wheat cultivars to head blight caused by Fusarium graminearum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Ntushelo --- , South Africa W. H. P. Boshoff --- , South AfricaHead blight caused by Fusarium graminearum (Schwabe) is an important wheat (Triticum aestivum L.) disease in the centrepivot irrigation areas of South Africa. Fifteen cultivars, Gamtoos, Inia, Kariega, Marico, Nantes, Palmiet, SST 38, SST 55, SST 57, SST 65, SST... -
Relationship between acid saturation and hydrogen activity of soils from different districts in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- Department of Agriculture, Conservation and Environment, North West Province, Republic of South AfricaSoil analyses results from six districts in the western maize producing areas of South Africa were used for correlating exchangeable acidity and acid saturation with hydrogen ion activity (pH). From the resulting regression equations, the pH values that corresponded with... -
Stimulation and suppression of mineralisation and nitrification in incubated soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K. Agrella --- Department of Plant Production and Soil Science, South Africa P. Boeckx --- Department of Applied Analytical and Physical Chemistry, Belgium A.S. Claassens --- Department of Plant Production and Soil Science, South Africa O. Van Cleemput --- Department of Applied Analytical and Physical Chemistry, BelgiumPriming, induced through the addition of oxidisable organic matter, releases or immobilises nitrogen and other nutrients in the soil. Moisture plays a very important role in priming as it stimulates microbial activity after a dry soil is wetted, especially with... -
First report of groundnut leafminer, Aproaerema modicella (Deventer) (Lepidoptera: Gelechiidae) on groundnut, soybean and lucerne in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. du Plessis --- , South AfricaThe groundnut leafminer, Aproaerema modicella is an important pest of groundnut and soybean in South and South-East Asia. It has also been reported from Uganda, Malawi and Mozambique. During 2000, it was first noticed on groundnut in South Africa. Since... -
Effect of soil tillage, crop rotation and nitrogen application rates on soil mineral-N levels in the Swartland wheat producing area of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.H. Maali --- Department of Agronomy, Republic of South Africa G.A. Agenbag --- Department of Agronomy, Republic of South AfricaStudies on nitrogen (N) levels in soil were conducted from 1997 to 2000 in a long-term tillage and crop rotation trial, which started in 1976. Three tillage methods namely conventional tillage (CT), tine tillage (TT), and notillage (NT) were compared... -
Rehabilitation of co-disposed kimberlite tailings: Quantifying physical and chemical properties from a rehabilitation perspective
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. van Rensburg --- , South Africa M.S. Maboeta --- , South AfricaMine rehabilitation is a complex process and the potential of revegetating kimberlite tailings (after being co-disposed) was evaluated in this study, with regard to physical and chemical properties. High water soluble Na concentrations (8.22 mmol -1) represent the most serious... -
Soil mineralogy research in South Africa, 1978 to 2002 - a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , South Africa B.J. Escott --- Soil Science, South Africa J.C. Hughes --- Soil Science, South AfricaOver 160 publications that contain mineralogical information were produced in the last 25 years of which about half were published in national and international journals. In many articles mineralogical data were presented but not discussed. Most studies were concerned with... -
Effectiveness of cattle manure and nitrogen fertilizer application on the agronomic and economic performance of maize
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Nyamangara --- Department of Soil Science and Agricultural Engineering, M. Mudhara --- Department of Soil Science and Agricultural Engineering, K.E. Giller --- Department of Soil Science and Agricultural Engineering,The effects of N fertilizer and aerobically composted cattle manure, applied separately or in combination, on maize (Zea mays L.) grain yields and net benefits were determined over three seasons. A field experiment was established on a moderately leached sandy... -
Acidity/Al aspects in soils of the Lusikisiki area, Eastern Cape Province
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Bühmann --- , D.J. Beukes --- , D.P. Turner --- ,Soil acidity related parameters like pH, extractable and soil organic matter bound Al, amorphous Al phases and Al substitutions in secondary iron minerals were determined on 57 samples from 15 representative soil profiles from the Lusikisiki area. The pH (H2O)... -
Effect of liming and mineral nutrition on growth of honeybush (Cyclopia spp.) plants
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.E. Joubert --- , South Africa W. A.G. Kotzé --- , South Africa J. Wooldridge --- , South AfricaA short-duration pot trial was carried out to determine the effects of liming and of mineral nutrients on Cyclopia spp., a newly commercially significant member of the fynbos flora, which habitually grows in acid, low phosphorus (P) sandy soils. Total... -
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... -
The lower and upper threshold values, biological optimum and mineralization of nitrogen in the main maize producing soils of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J.J. Van Biljon --- , 2021 Republic of South Africa D.S. Fouche --- , 2021 Republic of South Africa A.D.P. Botha --- , Republic of South AfricaThere is still no consensus in South Africa on the parameters used to advise maize farmers on the quantity of N needed for optimum yields. In order to determine the lower and upper threshold values for nitrogen (N), the biological... -
Using morphological characteristics to distinguish between male and female larvae and pupae of the groundnut leafminer, Aproaerema modicella (Deventer) (Lepidoptera: Gelechiidae)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. van der Walt --- , South Africa J. van den Berg --- , South Africa H. Du Plessis --- , South AfricaThe groundnut leafminer, Aproaerema modicella (Deventer) (Lepidoptera: Gelechiidae) is a well known groundnut pest in Asia. It was first reported in east Africa during 1998 after which it rapidly spread throughout East and southern Africa. The adult is a small... -
Effects of liming on microbial activity and N mineralization in broiler manure-amended soils from Bizana, Eastern Cape, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: G.G. Jezile --- Department of Soil and Crop Sciences, USA D.G. Westfall --- Department of Soil and Crop Sciences, USA G. Peterson --- Department of Soil and Crop Sciences, USA D.R. Child --- Department of Rangeland Ecosystem Sciences, USA D.P. Turner --- , RSA W. Van Averbeke --- , RSAA laboratory incubation study was conducted to determine the effects of liming on microbial activity and N mineralization in two Bizana soils amended with broiler manure. The experimental layout was a 4 x 3 complete factorial experiment with three replicates,... -
Crop physiology: A perspective for southern Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.T. Modi --- , P.L. Greenfield --- ,Crop physiology is a broad subject and a comprehensive treatise of all its aspects is impossible, even in a whole volume dedicated to the subject. With a few exceptions, plant physiology, rather than crop physiology, is commonly the focus when... -
Particulate organic matter, soil texture and mineralogy relations in some Eastern Cape ecotopes in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AD Nciizah --- Department of Agronomy, South Africa IIC Wakindiki --- Department of Agronomy, South AfricaContrasting reports have been given on the relationships between soil texture, mineralogy and particulate organic matter (POM). The objective of this study was to determine the effects of soil texture and mineralogy on aggregate POM in several ecotopes in the... -
Chickpea residue properties controlling decomposition dynamics and nitrogen availability in some tropical acid soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Benjamin O Danga --- Department of Agricultural Resource Management, Kenya Aviva Hadas --- Department of Soil Chemistry and Plant Nutrition, Israel Isaiah IC Wakindiki --- Department of Agronomy, South Africa Josephine P Ouma --- Department of Crops, Horticulture and Soils, Kenya Asher Bar-Tal --- Department of Soil Chemistry and Plant Nutrition, IsraelChickpea (Cicer arietinum) grown in a rotation can contribute significant nitrogen (N) if its decomposition and nutrient-release dynamics are known and synchronised with the maximum demand by the succeeding crop. The aims of the study were to investigate the decomposition... -
THE LIMNOLOGY OF SOME SOUTH AFRICAN IMPOUNDMENTS I. THE PHYSICO-CHEMICAL LIMNOLOGY OF HARTBEESPOORT DAM
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: W.E. Scott --- , South Africa M.T. Seaman --- , South Africa A.D. Connell --- , South Africa S.I. Kohlmeyer --- , South Africa D.F. Toerien --- , South AfricaHartbeespoort Dam is a eutrophic, warm monomictic lake with overturn occurring in April. The lake is stratified for about six months of the year and in late summer the stratification appears stable. Light penetration in the dam depends both on... -
QUALITY AND NUTRIENT RELEASE OF POULTRY MANURE IMMERSED IN WATER
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: O.V. Msiska --- Ministry of Forestry and Natural Resources, Fisheries Department, MalawiAttempts aimed at establishing a sound basis for the frequency of manure inputs into fish pond water showed that the greater bulk of mineral release occurs within 72 hours of immersion into water. Elemental composition of the poultry manure revealed... -
Mineral element status of soils, native pastures and cattle blood serum in the mid-altitude of western Ethiopia
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Lemma Gizachew Adane Hirpha Fikadu Jalata G N SmitDespite the crucial role of mineral elements in animal production and health, their status in soil, native pasture and animal body tissues or fluids in the mid-altitude of Ethiopia has had little study. To determine the concentration of mineral elements... -
Composition changes of Atriplex nummularia L. under a Mediterranean arid environment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Moh'd KhairJ El-Shatnawi AbdullahY AbdullahOld man saltbush (A. nummularia L.) is an adapted introduced shrub used for rangeland reclamation in Mediterranean desert shrublands. It provides valuable fodder during the long dry season and during drought. The objective of this study was to determine the... -
The impact of grazing on forage quality of the herbaceous vegetation in the Mamora cork oak forest, Morocco
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M. Mejjati Alami --- Department of Plant Ecology and Range Science, Morocco T.E. Bedell --- Department of Rangeland Resources, United States S.H. Sharrow --- Department of Rangeland Resources, United States O. Berkat --- Department of Plant Ecology and Range Science, MoroccoThis research was conducted in the Mamora cork oak forest of Morocco to describe the impacts of sheep grazing (no use, 35% use, 70% use) in March, April, May and June of 1987 and 1988 on seasonal changes in forage... -
An investigation into the establishment of indigenous trees on treated mine residue soils in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: NeerajM. Dharamraj --- , WilmaG. Gaum --- Department of Applied Natural Sciences, South Africa Annelize Hildebrand --- Department of Applied Natural Sciences, South AfricaMine residue soils have been the cause of barren landscapes and due to its toxic nature, these soils have proved difficult in establishing any form of vegetation. A selection of indigenous tree species mainly used for the establishment of indigenous... -
Control of Eucalyptus grandis cut-stumps of single-stem origin
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: K.M. Little --- , Republic of South Africa N.S. Eccles --- , Republic of South AfricaFour methods to control coppice re-growth on single-stem cut-stump Eucalyptus grandis stools were tested in the Zululand region of KwaZulu-Natal. The methods used were the burning of the plantation residue as opposed to a no-burn control, the application of triclopyr... -
Validating Measures of Psychological Well-being by Contrasting Samples Employed in Hazardous and Less Hazardous Work
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Deo J. W. Strümpfer --- University of Johannesburg, South Africa Riëtte J. Eiselen --- University of Johannesburg, South Africa Deon Meiring --- University of Pretoria, Jack S. Phalatse --- SASOL Mining,The study investigated whether differences between contrasting groups reflect significant differences in psychological well-being scores. Membership of hazardous vs. less hazardous occupations in the same profession served as proxy measures of well-being. Antonovsky's Sense of Coherence (SOC), Block & Kremen's... -
Is khat-chewing associated with HIV risk behaviour? A community-based study from Ethiopia
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Abebe Dawit Asfaw Debella Amare Dejene Almaz Abebe Yared Mekonnen Ambaye Degefa Lemma KetemaThis study examines the possible association between the stimulant khat and risky sexual behaviour that might aggravate the spread of HIV. A community-based cross-sectional survey involving 4 000 individuals and focus group discussions were conducted to assess the attitudes and... -
Acute effects of Cu on oxygen consumption and 96 hr-LC50 values in the freshwater fish Tilapia sparrmani (Teleostei: Cichlidae) in Mooi River hard water, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: WJ van Aardt Mynhardt HoughThe median lethal copper (Cu) concentration (96 hr-LC50) values for acute Cu toxicity for Tilapia sparrmanii (live mass: 30 ± 8g) in Mooi River hard water of dolomitic origin at 20 °C, pH 7.9, was 68.1 μmol l−1. At this... -
Nature of suspended particulate matter and concentrations of heavy metals in sediment in the southern part of Lake Victoria, East Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JF Machiwa --- Department of Aquatic Environment and Conservation, TanzaniaThe concentrations of metals in bottom sediment in the Tanzanian waters of Lake Victoria and the nature of suspended particulate matter (SPM) were analysed. The objective of the study was to compare levels of metals in sediment from different locations... -
Water quality impacts on instream biota of the Shingwedzi River, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: PSO Fouche --- Department of Zoology, South Africa W Vlok --- Department of Zoology, South AfricaWater quality, macroinvertebrate diversity (using SASS5) and fish diversity (using the fish response assessment index) of the Shingwedzi River system were monitored in 2007/2008 to determine the present status of the system. Possible water pollution sources were identified by aerial... -
Enzymatic activities as potential stress biomarkers of two substituted benzene compounds in Propsilocerus akamusi (Diptera: Chironomidae)
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: CW Cao --- Department of Forest Protection, People's Republic of China XP Li --- Department of Forest Protection, People's Republic of China SL Ge --- Department of Forest Protection, People's Republic of China LL Sun --- Department of Forest Protection, People's Republic of China ZY Wang --- Department of Forest Protection, People's Republic of ChinaChironomids are a globally distributed family of insects that can serve as biological indicators of environmental pollution. Substituted benzenes are a group of serious environmental pollutants and severely threaten biological and human health. In order to investigate potential stress biomarkers... -
Litter Fall and Decomposition in Stands of Mature Pinus radiata
Item type: Journal Article • Journal: South African Forestry Journal • Authors: D.B. Versfeld --- Department of Water Affairs, Forestry and Environmental Conservation,Rates of litter fall in mature stands of Pinus radiata D. Don have been monitored at the Jonkershoek Forestry Research Station since 1976. Decomposition trials were laid out in June 1977. Litter fall has been collected on six sites in... -
Trace metal effects on the production of biotoxins by microalgae
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Rhodes A Selwood P McNabb L Briggs J Adamson R van Ginkel O LaczkaMass production of bioactive compounds was enhanced by the addition of particular trace metals to specific microalgae. An increase in domoic acid isomer-C production by Pseudo-nitzschia australis was achieved by adding copper (Cu) or Zinc (0.1–0.2μmol l−1) to standard growth... -
Toxicological requirements for risk assessment of shellfish contaminants: a review
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: R MundayThere is increasing concern by consumers with regard to the health aspects and safety of foodstuffs. Most food additives and contaminants are controlled by regulatory authorities, with Acceptable Daily Intakes (ADIs) having been set on the basis of detailed acute... -
The Impact of Privatisation on Technological Upgrading: A Case Study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Judith Fessehaie --- Research Associate, PRISM,This paper investigates the trajectory of Zambia's local supply chain to the copper mining sector. The policies adopted in the 1990s under the Structural Adjustment Programme succeeded in attracting much-needed foreign direct investment (FDI) to the mining sector. Nevertheless, state... -
The influence of site factors on nitrogen mineralization in forest soils of the Mpumalanga escarpment area: South africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: J.H. Louwa --- , M. Scholes --- School of Animal, Plant & Environmental Sciences,The complex biophysical environmental conditions that occur in South Mrican forestry plantations prompt appropriate guidelines for nutrient management applications. Nutrient budget studies in plantation ecosystems indicated a negative nitrogen (N) balance on many sites. Empirical fertilizer trails have shown that,... -
The impact of the addition of Eucalyptus grandis wood chips on nitrogen availability in plantation soils
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: TheresaL. Bird --- School of Animal, Plant and Environmental Sciences, MaryC. ScholesThe impact of plantation residues, as a result of clearfelling, on nutrient availability in plantation systems, as well as the difficulties during subsequent planting and harvesting, should be considered in the development of plantation management strategies. The aim of this... -
Exploring the relationship between HIV and alcohol use in a remote Namibian mining community
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Elizabeth Lightfoot --- School of Social Work, United States Maretha Maree --- Department of Human Science, Namibia Janet Ananias --- Department of Human Science, NamibiaIn southern Africa, the use of alcohol is increasingly seen as creating a context of risk for HIV transmission. This qualitative study investigates the links between alcohol use and higher-risk sexual behaviours in a remote southern Namibian mining-town community. Using... -
Heavy metals in the water and sediments of Oued Es-Souk, Algeria, a river receiving acid effluents from an abandoned mine
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Chahrazed BoukhalfaThe Sidi Kamber Mine, abandoned since 1976, is still a source of acidic drainage entering the Oued Es-Souk River. An investigation of the rate of pollution of the Oued Es-Souk and the variation of its water quality showed that the... -
Confirmed identification of gymnodimine in oysters from the west coast of South Africa by liquid chromatography–tandem mass spectrometry
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: B Krock GC Pitcher J Ntuli AD CembellaMussels Choromytilus meridionalis and oysters Crassostrea gigas were suspended from a mooring off Lambert's Bay, South Africa, to study the kinetics of lipophilic phycotoxin accumulation and detoxification. The shellfish were subsequently harvested daily over approximately three weeks and analysed for... -
A note on the potential nutritive value of Ziziphus mucronata (buffalo thorn) foliage during different seasons
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Abubeker Hassen --- Department of Animal and Wildlife Science, South Africa NFG Rethman --- Department of Plant Production and Soil Science, South Africa WA van Niekerk --- Department of Animal and Wildlife Science, South AfricaFoliage of Ziziphus mucronata (buffalo thorn) was collected during the spring, summer and autumn. The chemical composition and in vitro digestibility of organic matter (IVDOM) of these samples were determined. Crude protein concentration ranged between 123–262 g kg DM−1, and... -
Mineralisation of organic fertilisers used by urban farmers in Harare and their effects on maize (Zea mays L.) biomass production and uptake of nutrients and heavy metals
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Armwell Shumba --- Department of Soil Science and Agricultural Engineering, Zimbabwe Ronald Marumbi --- Department of Soil Science and Agricultural Engineering, Zimbabwe Blessing Nyamasoka --- Department of Soil Science and Agricultural Engineering, Zimbabwe Phillip Nyamugafata --- Department of Soil Science and Agricultural Engineering, Zimbabwe Justice Nyamangara --- Matopos Research Station, Zimbabwe Simon Madyiwa --- Department of Soil Science and Agricultural Engineering, ZimbabweNutrient release patterns and heavy metal contamination risks associated with animal manure and organic municipal wastes used as basal fertilisers are largely unknown in Zimbabwe. Carbon, nitrogen and phosphorus mineralisation patterns were determined in a 56-day incubation experiment of domestic... -
Morphine sparing effect of low dose ketamine during patient controlled analgesia
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: FJ Smith --- Department of Anaesthesiology, CGJ Briel --- Department of Anaesthesiology, PJ Becker --- Unit for Biostatistics, South AfricaObjective: To compare the quality of intravenous patient controlled analgesia (PCIA) of low dose morphine plus ketamine with morphine. Design: Double blind case control study. Setting: Academic hospital. Patients: Thirty-six patients scheduled for elective abdominal hysterectomy were randomly divided into... -
The influence of anaesthetic drug selection for scoliosis surgery on the management of intraoperative haemodynamic stability and postoperative pain—pharmaceutical care programme
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: BA Hadi --- Faculty of Pharmacy, Jordan R Al Ramadani --- Faculty of Pharmacy, Jordan R Daas --- Arab Medical Center, Fifth Circle, Jordan I Naylor --- School of Pharmacy, Bradford University, UK R Zelko --- Pharmacy Department, Hungary M Saleh --- Arab Medical Center, Fifth Circle, JordanAim: The aim of this study was to conduct a pharmaceutical care programme for two different anaesthetic methods used during scoliosis surgery, to investigate which method ensured better intraoperative haemodynamic stability and postoperative pain control. -
Oral ketamine for wound care procedures in adult patients with burns
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: HA Ezike --- Department of Anaesthesia, Nigeria MC Odiakosa --- Department of Anaesthesia, NigeriaBackground: This prospective study was carried out to evaluate the usefulness of oral ketamine for burn wound dressing in adult patients. The aim was to achieve a state-of-conscious sedation in which the patient would be communicative and cooperative, with minimal,... -
Postoperative analgesia in children: getting it right
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: CA Lee --- Department of Anaesthesiology,The management of postoperative pain in children has historically been poor, but advances have been made in the last decade. As pain is a complex phenomenon, a multimodal approach to treatment is required. This article aims to give a brief... -
A survey of corticosteroid use for the management of septic shock
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Govender --- Department of Anaesthetics, RN Rodseth --- Perioperative Research Group, Department of Anaesthetics,Background: Critical illness is associated with pituitary-adrenal axis dysfunction, and may cause adrenal insufficiency that manifests as septic shock that is poorly responsive to fluid or inotropic therapy. Administering a low-dose corticosteroid to these patients results in faster shock resolution,... -
A placebo-controlled comparison of ketamine with pethidine for the prevention of postoperative shivering
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: AM Dar --- Department of Anaesthesiology and Critical Care, India SM Qazi --- Department of Anaesthesiology and Critical Care, India S Sidiq --- Department of Anaesthesiology and Critical Care, IndiaObjective: Postanaesthetic shivering is a recognised complication of general and regional anaesthesia. Pharmacological and nonpharmacological methods have been used to prevent shivering. This study was conducted to determine the efficacy of ketamine when compared with pethidine and placebo for the... -
Effectiveness of low-dose midazolam plus ketamine in the prevention of shivering during spinal anaesthesia for emergency lower limb surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: K Misiran --- Department of Anaesthesiology and Intensive Care, Faculty of Medicine, Malaysia FZ Aziz --- Department of Anaesthesia and Intensive Care, MalaysiaObjective: This study was conducted to compare the effectiveness of two different dosages of intravenous midazolam in combination with ketamine in the prevention of shivering during spinal anaesthesia for emergency lower limb surgery. -
Regional anaesthesia in children: an update
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: AT Bosenberg --- Department Anesthesiology and Pain Management, Faculty Health Sciences, USARegional anaesthesia for children continues to grow in popularity. The potential benefits of regional anaesthesia over more conventional methods are well recognised, but the level of evidence is small since there are few well designed randomised controlled studies on infants... -
Ketamine: old dogs, new tricks
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: GS Wilson --- Department of Anaesthesia,Ketamine is one of the oldest intravenous anaesthetic agents that is still in clinical use. Its unique mechanism of action and interaction with a variety of different receptors has sparked renewed interest in its use in a host of alternative... -
Anaesthetic management of a rare variety of cardiac myxoma for emergency decompression laminectomy
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: S Yemul-Golhar --- Department of Anaesthesia, India S Shinde --- Department of Anaesthesia, India K Kelkar --- Department of Anaesthesia, IndiaPrimary cardiac tumours are rare. Right ventricular myxomas and a combination of right atrial and ventricular myxomas are very rare. A patient with myxoma has several problems, including haemodynamic compromise in a particular position, embolisation and hypoxaemia because of low... -
Migraine-associated vertigo and dizziness as presenting complaint in a private general medical practice
Item type: Journal Article • Journal: South African Family Practice • Authors: T Jay-du Preez --- Department of Physiology, Faculty of Health Sciences, South Africa D Van Papendorp --- Department of Physiology, Faculty of Health Sciences, South AfricaBackground: Migraine-associated vertigo (MV) remains a developing entity because accepted diagnostic criteria are unavailable. Patients present with debilitating dizziness without experiencing headache, and are often misdiagnosed as anxious. The condition is manageable in primary care without the need for neurological... -
The development, implementation and evaluation of a short course in objective structured clinical examination (OSCE) skills
Item type: Journal Article • Journal: South African Family Practice • Authors: A De Villiers --- Centre for Health Sciences Education, Faculty of Health Sciences, E Archer --- Centre for Health Sciences Education, Faculty of Health Sciences,Background: Objective structured clinical examination (OSCE) examiner training is widely employed to address some of the reliability and validity issues that accompany the use of this assessment tool. An OSCE skills course was developed and implemented at the Stellenbosch Faculty... -
A broken link: two generations in a rural household in Massinga district, southern Mozambique
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Albert Farré --- The Human Economy Project, Faculty of Humanities, South AfricaLabour migration has long been a recurrent topic in southern Africa, owing to the appearance of industrialised mining production in the mid-nineteenth century, and its overall effects on land and agriculture. In Mozambique, historically one of the main suppliers to... -
Unexpected sneezing after a peribulbar injection in a patient for elective cataract surgery
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Teena Bansal --- University of Health Sciences, India Rajmala Jaiswal --- University of Health Sciences, India Sarla Hooda --- University of Health Sciences, IndiaSneezing or the sternutatory reflex, inborn in most animals, is a primitive neuromuscular physiological response to irritation. Sometimes, unusual sneezing occurs during and immediately after a peribulbar block, which is generally performed with a local anaesthetic in awake patients. We... -
Establishing Cynodon dactylon on mining tailings and mining-impacted soil of a copper–cobalt mine in the Democratic Republic of the Congo
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: JE Granger --- SAEON, South Africa TG O'Connor --- SAEON, South AfricaMining for copper and cobalt generates extensive mounds of removed topsoil and subsoil, and tailings with toxic levels of copper and cobalt. The threat of soil erosion in a high rainfall regime can be countered with rapid establishment of a... -
A broken link: two generations in a rural household in Massinga district, southern Mozambique
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Albert Farré --- The Human Economy Project, Faculty of Humanities, South AfricaLabour migration has long been a recurrent topic in southern Africa, owing to the appearance of industrialised mining production in the mid-nineteenth century, and its overall effects on land and agriculture. In Mozambique, historically one of the main suppliers to... -
Assessing the potential benefits of organic and mineral fertiliser combinations on legume productivity under smallholder management in Zimbabwe
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Grace Kanonge --- Chemistry and Soils Research Institute, Zimbabwe Florence Mtambanengwe --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Muneta G Manzeke --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Hatirarami Nezomba --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, Zimbabwe Paul Mapfumo --- Soil Fertility Consortium for Southern Africa (SOFECSA), Department of Soil Science and Agricultural Engineering, ZimbabweProductivity of grain legumes on sandy soils of southern Africa is critically limited by marginal fertilisation. Effects of co-applying phosphorus (P)-based mineral fertilisers and organic nutrient resources to cowpea (Vigna unguiculata (L.) Walp.) and soyabean (Glycine max L.) were investigated... -
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... -
Soil water and mineral nitrogen content as influenced by crop rotation and tillage practice in the Swartland subregion of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Japie D Wiese --- Department of Agronomy, South Africa Johan Labuschagne --- Directorate Plant Science, South Africa Gert A Agenbag --- Department of Agronomy, South AfricaAdoption of conservation agricultural practices, reduced tillage and crop rotation in the grain-producing areas of the Western Cape, South Africa, resulted in a gradual build-up of organic matter on the soil surface. It was expected that the increase in organic... -
Physical crust formation and steady-state infiltration rate in soils dominated by primary minerals in some South African ecotopes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Adornis D Nciizah --- Department of Agronomy, South Africa Isaiah IC Wakindiki --- Department of Agronomy, South AfricaPhysical crust formation is affected by the inherent soil properties such as texture and mineralogy. However, inconsistencies exist in soil mineralogy effects of soil crusting. In addition, investigations of soils dominated by primary minerals such as quartz, especially in South... -
Nile perch and the transformation of Lake Victoria
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: A Taabu-Munyaho --- National Fisheries Resources Research Institute (NaFIRRI), Uganda BE Marshall --- Lake Victoria Fisheries Organisation (LVFO), New Zealand T Tomasson --- United Nations University – Fisheries Training Programme (UNU–FTP), Marine Research Institute, Iceland G Marteinsdottir --- Institute of Biology, IcelandThe transformation of Lake Victoria that began in 1980 followed the population explosion of Nile perch Lates niloticus, causing the apparent extirpation of 500+ endemic haplochromine species and dramatic physico-chemical changes. Officially introduced in 1962–1963, but present earlier, the reasons... -
Malnutrition in the acutely ill patient: is it more than just protein and energy?
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Pe Wischmeyer --- Professor of Anaesthesiology, University of Colorado,Malnutrition has traditionally been thought to involve deficiencies in protein and energy (macronutrients); however, we know that specific key nutrients, when deficient. can also lead to significant morbidity and mortality. Large studies performed with replacement of single nutrients, such as... -
The female athlete triad in student track and field athletes
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Jg Robbeson --- Centre of Excellence for Nutrition, L Havemann-Nel --- Centre of Excellence for Nutrition, Hh Wright --- Centre of Excellence for Nutrition,Objectives: To explore the female athlete triad components in university track and field athletes, as well as calculate estimated energy availability. -
Reliability of an adult respiratory symptom questionnaire in a community located near a mine dump in South Africa: pilot study
Item type: Journal Article • Journal: Southern African Journal of Infectious Diseases • Authors: Vusumuzi Nkosi --- Faculty of Health Sciences, South Africa Kuku Voyi --- Faculty of Health Sciences, South AfricaBackground: Pretesting a questionnaire is an important activity before the start of the main epidemiological study. Aim: The study tested the reliability (internal consistency) of the modified ATS-DLD-78 adult respiratory diseases questionnaire developed by the British Medical Research Council. Results:... -
The annual pattern of sap flow in two Eucalyptus species established in the vicinity of gold-mine tailings dams in central South Africa
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Peter Dye --- Ecological Engineering and Phytotechnology Programme, Restoration and Conservation Biology Research Group, School of Animal, Plant and Environmental Sciences, South Africa Alistair Clulow --- Agrometeorology, South Africa Eric Prinsloo --- CSIR, Built Environment, South Africa Vivek Naiken --- CSIR, Natural Resources and the Environment, c/o Agrometeorology, South Africa Isabel Weiersbye --- Ecological Engineering and Phytotechnology Programme, Restoration and Conservation Biology Research Group, School of Animal, Plant and Environmental Sciences, South AfricaSeveral hundred mine tailings dams occur in the Witwatersrand Basin Goldfields in central South Africa. Seepage of acid mine drainage (AMD) from these unlined structures is widespread, and a variety of contaminants is released into soil and groundwater. The ‘Mine... -
Dilated cardiomyopathy in a child with abdominal neuroblastoma and normal serum catecholamine levels: anaesthetic management and review of literature
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: Anuradha Ganigara --- Department of Pediatric Anesthesiology, India Chandrika Yabagodu Ramavakoda --- Department of Pediatric Anesthesiology, India Chandana M Srinivasan --- Department of Pediatric Anesthesiology, India Madhusudan Ganigara --- Department of Pediatrics, USANeuroblastoma is the most common extracranial solid tumour of childhood. Dilated cardiomyopathy as an initial presentation of neuroblastoma is rare. We report the case of a three-year-old child with giant abdominal neuroblastoma encasing the abdominal aorta who presented with dilated... -
Soil fertility and growth of Eucalyptus grandis in Brazil under different residue management practices
Item type: Journal Article • Journal: Southern Hemisphere Forestry Journal • Authors: JLM Gonçalves MCP Wichert JL Gava AV Masetto ArthurJ.C. Junior MIP Serrano SLM MelloSilvicultural operations such as soil preparation, logging residue management and application of fertilisers can influence soil fertility, and hence nutrient uptake and tree growth. This paper reports the effect of site management practices of minimum and intensive cultivation of the... -
Glutamine and its use in selected oncology settings
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Reinette Tydeman-Edwards --- Chief Dietician, South AfricaThis review summarises the latest evidence for the use of glutamine (GLN) in oncology taking cognisance of current systematic reviews and available guidelines. Various studies in adults suggest that GLN supplementation suppresses tumour growth, by restoring the function of natural... -
The rise and fall of Liqhobong Diamond Mine Cooperative in Lesotho
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Esther Makhetha --- Department of Anthropology and Archaeology, South AfricaDiamond mining in the rural highlands of Lesotho has taken different forms over the past century: unregulated diamond digging by locals and “migrant” diggers in the early 1950s; regulated diamond mining by a state-sponsored diamond cooperative from 1978 onwards; and... -
Yield, nutrient and heavy metal uptake of leafy vegetables grown in sewage sludge and poultry manure amended soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Blessing Nyamasoka --- Department of Soil Science and Agricultural Engineering, Zimbabwe Ronald Marumbi --- Department of Soil Science and Agricultural Engineering, Zimbabwe Armwell Shumba --- Department of Soil Science and Agricultural Engineering, Zimbabwe Phillip Nyamugafata --- Department of Soil Science and Agricultural Engineering, Zimbabwe Simon Madyiwa --- Department of Soil Science and Agricultural Engineering, Zimbabwe Justice Nyamangara --- Department of Environmental Science and Technology, ZimbabweUrban farmers in Harare grow vegetables in soils fertilised with poultry manure (PM) and sewage sludge (SS). Feed and storage management influence nutrient supply of these organic amendments. Nitrogen mineralisation of PM and SS were determined in a non-leaching and... -
Wrong pedogenetic assumptions: a case study of the soils developed over talc in Southern Guinea Savanna of Nigeria using clay mineralogy
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Godwin A Ajiboye --- Department of Soil Science and Land Management, Nigeria JA Ogunwale --- Department of Agronomy, Nigeria James Talbot --- K/T Geoservices Inc., USA Samuel A Mesele --- Department of Soil Science and Land Management, NigeriaIt is often assumed that ultrabasic parent material leads to the formation of soils rich in 2:1 clays and dibasic cations. However, in a tropical environment with intense weathering, this assumption may not be true. To investigate this assumption soil... -
Spatio-seasonal dynamics of bacteria and metal composition of a platinum mine tailings dam, Rustenburg, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Molemi E Rauwane --- Agricultural Research Council–Biotechnology Platform, South Africa Laurette M Marais --- Department of Biotechnology, Faculty of Applied and Computer Sciences, Vanderbijlpark Campus, South Africa Oluwatosin G Oladipo --- Unit for Environmental Sciences and Management, South Africa Cornelius C Bezuidenhout --- Unit for Environmental Sciences and Management, South Africa Mark S Maboeta --- Unit for Environmental Sciences and Management, South AfricaSeasonal variations and proximity to polluted sites, among other factors, play a vital role in soil composition. The impact of spatio-seasonal changes on bacterial and heavy metal content on and around the platinum mine tailings dam, Rustenburg, South Africa, was... -
Macro and trace elements of 26 browse species growing in semi-arid grazing lands of Eastern Cape, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Solomon Tefera --- Department of Animal Science, Namibia Victor Mlambo --- Department of Animal Sciences, South AfricaLeaves and twigs from woody plants provide essential nutrients to range animals. We examined variation in the mineral status of 26 woody species, and the influence of harvesting height as well as the interactions of the main effects on minerals... -
Geochemistry, heavy mineral and sedimentological analyses of potential reservoir sand samples from Kolmani River-1 well, Northern Benue Trough, Nigeria
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: S. A. Adekola --- Department of Geology, Nigeria A. Akinlua --- Fossil Fuels and Environmental Geochemistry Group, Department of Chemistry, Nigeria T. R. Ajayi --- Department of Geology, Nigeria T. A. Adesiyan --- Department of Geology, Nigeria D. O. Ige --- Department of Geology, NigeriaForty ditch cutting samples were worked on, twenty each for trace elements and sedimentological analyses. A few of these samples were selected for the analysis of heavy minerals within the Bima sandstone and shale sandstone units. The samples were obtained... -
Prediction of primary salinity, sodicity and alkalinity in South African soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J Piet Nell --- Agricultural Research Council–Institute for Soil, South Africa Cornelius W van Huyssteen --- Department of Soil, Crop and Climate Science, South AfricaSeveral attempts have in the past been made to map the primary salinity, sodicity and alkalinity of South African soils. These have typically been based on personal experience and/or limited data and also failed to quantify the accuracy of prediction... -
Yield and nutritional quality of different short-day onion cultivars as affected by nitrogen application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Mbulelo Ncayiyana --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa Martin M Maboko --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa Isa Bertling --- Horticultural Science, School of Agricultural, Earth and Environmental Sciences, South AfricaOnion is one of the most important vegetable crops in the world, cultivated and consumed for its flavour-enhancing and medicinal properties; hence, comprehensive understanding of crop responses to N application is of immense importance. To determine the effects of different... -
A reflection on a visual ethnography of Namibia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Rosa Persendt --- Contemporary Social Issues Unit, Office of the Pro-Vice-Chancellor (Academic Affairs), NamibiaIn this essay, Rosa Persendt reflects on Gregor Dobler's photo essay “Presence and Absence: Shops as Traces of Hopes in Apartheid Namibia” which deals with ethnographic photos taken of empty cucu [trading stores] opened in the early 1950s and the... -
Improved parameters of Pinus greggii seedling growth and health after inoculation with ectomycorrhizal fungi
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rebeca Casique Valdés --- Department of Horticulture, Mexico Rosalinda Mendoza Villarreal --- Department of Horticulture, Mexico Fernando Galindo García --- Department of Horticulture, Mexico Susana González Morales --- Department of Horticulture, Mexico Sergio Sanchez Peña --- Department of Parasitology, MexicoPinus greggii Engelm. ex Parl. is an endemic pine of Mexico with notorious adaptability to eroded, shallow and poor soils. It is widely used in reforestation programmes worldwide. The purpose of the present study is to develop an ectomycorrhizal fungi... -
Bone fractures among adult Nigerians with hyperthyroidism: risk factors, pattern and frequency
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: AO Ale --- Department of Medicine, Nigeria OO Odusan --- Department of Medicine, Nigeria TO Afe --- Department of Medicine, Nigeria OL Adeyemo --- Department of Medicine, Nigeria AO Ogbera --- Department of Medicine, NigeriaBackground: Hyperthyroidism is a common endocrine disorder with multi-systemic effects, the least reported of which is bone loss and fractures. -
More than eating dirt: a review of avian geophagy
Item type: Journal Article • Journal: African Zoology • Authors: Colleen T Downs --- School of Life Sciences, South Africa Ian P Bredin --- School of Life Sciences, South Africa Peter D Wragg --- School of Life Sciences, South AfricaGeophagy, the ingestion of earth varying in particle size from stones to soils rich in clay, is a relatively widespread behaviour across avian taxa. We reviewed its occurrence in birds and its hypothesised adaptive functions in birds. Of the ∼30... -
Sex work among female workers in the traditional mining sector in Mali – results from the ANRS-12339 Sanu Gundo cross-sectional study in 2015
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Cheick Haïballa Kounta --- Aix Marseille University, France Luis Sagaon-Teyssier --- Aix Marseille University, France Hubert Balique --- Aix Marseille University, France Fodié Diallo --- ARCAD Sida, Mali Nikos Kalampalikis --- University Lyon 2, France Marion Mora --- Aix Marseille University, France Michel Bourrelly --- Aix Marseille University, France Marie Suzan-Monti --- Aix Marseille University, France Bruno Spire --- Aix Marseille University, France Bintou Dembélé Keita --- ARCAD Sida, MaliFemale sex workers (FSW) in mining sites are considered to be at very high risk of HIV infection. We aimed to characterize FSW at the Kôkôyô artisanal gold mining site in Mali, and identify factors associated with sex work using... -
Potassium fractions and availability for chickpea (Cicer arietinum) in Vertisols of north-west Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Yohannes Misskire --- Debre Markos University, Ethiopia Tekalign Mamo --- Center for Soil and Fertilizer Research in Africa, Morocco Abi M Taddesse --- Department of Chemistry, Ethiopia Uri Yermiyahu --- Gilat Research Center, Agricultural Research Organization, IsraelFor a critical appraisal of the supplying power of potassium (K) and to predict bioavailable K, it is necessary to have knowledge on the fractions of K and evaluate soil test methods for plant nutrition. This research aimed to assess... -
Differences between bone mineral density, lean and fat mass of HIV-positive and HIV-negative black women
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: C Ellis --- Centre of Excellence for Nutrition, North-West University, South Africa HS Kruger --- Centre of Excellence for Nutrition, North-West University, South Africa P Ukegbu --- Centre of Excellence for Nutrition, North-West University, South Africa IM Kruger --- Africa Unit for Transdisciplinary Health Research, North-West University, South Africa M Viljoen --- Department of Pharmacology and Clinical Pharmacy, South Africa MC Kruger --- School of Health Sciences, Massey University, New ZealandObjectives: To investigate the differences between bone mineral density (BMD), lean and fat mass of human immunodeficiency virus (HIV-) positive and HIV-negative black women and to investigate factors associated with low BMD. -
Body composition and intake of nutrients associated with bone metabolism in young adolescents in a peri-urban setting
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: M Fourie --- Department of Human Nutrition, School of Health Care Sciences, South Africa GJ Gericke --- Department of Human Nutrition, School of Health Care Sciences, South Africa MC Kruger --- School of Food and Nutrition, Massey Institute of Food Science and Technology, New ZealandObjective: The aim was to describe the anthropometry, bone mineral content (BMC), bone mineral density (BMD), dietary calcium intake and 25(OH)D3 levels in 11- and 12-year-old children in a peri-urban area. -
Argumentum ad hominem and coercive company culture influences on workaholism: Results and implications of a cross-cultural South Korea study
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Joon-ho Kim --- The Cultural Policy Network, South Korea Hyun-ju Choi --- Department of Cultural & Arts Management, South Korea Jong-pil Yu --- Department of Business Administration, South Korea Jeong-hee Lim --- Research Institute Multicultural Community, South Korea Hyuck-jin Lee --- Department of Economics & Trade, South Korea Seung-hye Jung --- School of Dance, South KoreaThe present study investigated the association between supervisors’ use of argumentum ad hominem or confrontational dialogue and companies’ coercive company culture on employees’ emotional exhaustion and workaholism. The survey was conducted with (non-permanent), multicultural foreign workers living in Seoul, Gyeonggi... -
The effects of different gold mine tailings on growth, reproduction and avoidance-behaviour of earthworms
Item type: Journal Article • Journal: African Zoology • Authors: Bryan McGuirk --- Unit for Environmental Sciences and Management, South Africa Pieter Theron --- Unit for Environmental Sciences and Management, South Africa Mark Maboeta --- Unit for Environmental Sciences and Management, South AfricaThe mining industry plays a key role in the economic development of South Africa as one of the largest exporters of valuable resources, such as gold, platinum group metals and other metals and minerals. Unfortunately, mining produces large volumes of... -
The developmental growth and quality assessment of five selected cultivars of baby spinach grown in Gauteng province, South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Nature M Masufi --- Department of Agriculture and Animal Health, South Africa Ambani R Mudau --- Department of Life and Consumer Science, South Africa Hintsa T Araya --- ARC-Roodeplaat, Vegetable and Ornamental Plants, South Africa Fhatuwani N Mudau --- Department of Agriculture and Animal Health, South AfricaBaby spinach is a relatively new crop in South Africa that has commercial significance in retail stores. Currently, seed companies have developed varieties that have not been evaluated locally. Thus, the aim of this study was to investigate the growth,... -
Preliminary mineralogical and geotechnical characteristics of Zogbodomey clays in the coastal sedimentary basin of Benin (West Africa)
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Sémondji Salvien Pyrrhus Agbon --- Département des Sciences de la Terre, Bénin Nelly Carine Kelome --- Département des Sciences de la Terre, Bénin Luc Adissin Glodji --- Département des Sciences de la Terre, BéninThe Benin coastal sedimentary basin is filled with deposits of clays of diverse nature. This study focused on the characteristics of clayey materials of Zogbodomey in sight of their valorization in the construction and ceramics sectors. The clay deposit is... -
Histopathology of the liver and gills of Labeo rosae (rednose Labeo) from Loskop Dam in South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Jeffrey Lebepe --- , South Africa Johan Steyl --- , South Africa Wilmien J Luus-Powell --- , South AfricaThe Loskop Dam is the most polluted impoundment in the Olifants River, because it receives pollutants from the entire mine-dominated upper catchment. However, histopathology of fish inhabiting this polluted dam is scantly explored. The current study aimed to investigate the... -
Bone health in patients undergoing surgery for primary hyperparathyroidism at Tygerberg Hospital, Cape Town, South Africa
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M Budge --- , W Conradie --- , K Beviss-Challinor --- , L Martin --- , M Conradie --- , A Coetzee --- , -
Prevalence and clinical risk factors for morphometric vertebral fractures in older subjects in KwaZulu-Natal
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: M Esaadi --- , South Africa F Paruk --- , South Africa B Cassim --- , South Africa -
Physiological response of ryegrass (Lolium spp.) grown at different temperatures to glufosinate ammonium application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Tendai Mucheri --- , South Africa Petrus J Pieterse --- , South Africa Carl F Reinhardt --- , South Africa Aleysia Kleinert --- , South AfricaEfficacy of glufosinate ammonium is influenced by temperature. However, several studies show variable results. The response of ryegrass (Lolium spp.) to glufosinate ammonium activity at different temperatures was investigated. Ryegrass was grown at 10/15, 15/20, 20/25, and 25/30 °C (night/day)... -
Germination performance of different forage grass species at different salinity (NaCl) concentrations
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M Mangwane --- , South Africa IC Madakadze --- , South Africa FV Nherera-Chokuda --- , South Africa S Dube --- , Zimbabwe M Mndela --- , South AfricaCertain grasses show potential for the rehabilitation of coalmine spoils. Species selection and evaluation are used to guide the choice of the most appropriate grass species. This study evaluated the germination performance of seven forage grass species, with some represented... -
Effect of soil type on spatial distribution and nutritive value of grass species growing in selected rangelands of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Khuliso E Ravhuhali --- , South Africa Victor Mlambo --- , South Africa Tefera S Beyene --- , South Africa Lobina G Palamuleni --- , South AfricaThe distribution and status of grass species is essential for sustainable management of rangelands. Therefore, this study assessed the spatial distribution and nutritive value of grass species as influenced by soil type in selected rangelands of the North West province... -
Organisational citizenship behaviours: Their influences on mineworkers’ turnover intention
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Khayalethu Ngqeza --- , South Africa Nelesh Dhanpat --- , South AfricaWe investigated organisational citizenship behaviour (OCB) influences on employee turnover intention in a mining organisation. The participants were 371 mining employees (men = 74%; women = 26%; mean age = 37.2 years, SD = 8.21 years). The employees completed standardised... -
The ecology of coastal wetland ponds created by diamond mining in southern Namibia. 1. Physical conditions
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Maritz --- , South Africa D Pillay --- , South Africa GM Branch --- , South AfricaCoastal diamond mining in southern Namibia involves constructing seawalls to hold the sea at bay, and seaward accretion of the shoreline by up to 800 m opens what was previously the surf zone for excavation and extraction of bedrock alluvial... -
A comparison of quality of life between HIV positive and negative diamond miners in South Africa
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: Jeff Gow --- , , Australia Gavin George --- , , South Africa Kaymarlin Govender --- , , South AfricaObjective: To analyse the health-related quality of life (HR-QOL) in two groups of diamond miners (HIV negative and positive) in South Africa using three instruments. Two hypotheses were to be tested. One, was that the HR-QOL of HIV positive miners... -
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... -
Forage yield, competition and economic benefit of intercropping cactus and millet with mulch in a semi-arid environment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marcondes de Sá Souza --- Universidade Federal Rural de Pernambuco, Brasil George do Nascimento Araújo Júnior --- Universidade Federal Rural de Pernambuco, Brasil Luciana Sandra Bastos de Souza --- Universidade Federal Rural de Pernambuco, Brasil Alexandre Maniçoba da Rosa Ferraz Jardim --- Universidade Federal Rural de Pernambuco, Brasil Gabriel Italo Novaes da Silva --- Universidade Federal Rural de Pernambuco, Brasil Gherman Garcia Leal de Araújo --- , Brasil Fleming Sena Campos --- , Brasil Maurício Luiz de Mello Vieira Leite --- Universidade Federal Rural de Pernambuco, Brasil José Nildo Tabosa --- Instituto Agronômico de Pernambuco, Brasil Thieres George Freire da Silva --- Universidade Federal Rural de Pernambuco, BrasilThis study aimed to quantify forage yield, economic performance, biological efficiency and competitive ability in cactus intercropped with millet, compared with their monocrops, both with and without mulch, under irrigation. The experiment was conducted over two years in semi-arid of... -
Comparison of rehabilitation treatments on mechanically reconstructed soils following strip coal mining activities: effects on soil properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: DJ Beukes --- Agricultural Research Council, South Africa LD Wiese-Rozanov --- Agricultural Research Council, South Africa MV Kidson --- Agricultural Research Council, South AfricaA rainfed rehabilitation trial on mechanically reconstructed soil, following strip coal mining, was laid out in the Mpumalanga Province of South Africa. It was used to evaluate seven rehabilitation treatments with four different depths of topsoil on coal spoil over... -
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... -
Population status of the range-restricted Red Lark Calendulauda burra in a conservation area stronghold
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ryno Kemp --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South Africa Robin Colyn --- BirdLife South Africa, Science and Innovation Programme, South Africa Marc T Freeman --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South Africa Andrew E McKechnie --- DSI-NRF Centre of Excellence at the FitzPatrick Institute, South AfricaMany desert birds are vulnerable to anthropogenic global warming and landscape transformation, particularly in the case of range-restricted species. We quantified suitable habitat and the current population of Red Larks Calendulauda burra (family Alaudidae), a range-restricted southern African species, in... -
Wider family in post-privatisation Zambia
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: James Musonda --- University of Liège, BelgiumThis article traces the economic and social dynamics animating kin-like relations amongst workers on the Zambian Copperbelt, their implications in everyday life and broader conceptions of family they engender. The article argues that the ability of mineworkers’ families to cope... -
Grazing effects on forage quality parameters of three rangeland species in arid regions of Semnan, Iran
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Milad Kamiziani --- University of Kurdistan, Iran Shima Nikoo --- Semnan University, Iran Hamed Joneidi Jafari --- University of Kurdistan, Iran Fateme Naghizade Asl --- Gorgan University of Agricultural Sciences and Natural Resources, IranForage quality determines livestock production and overgrazing results in significant changes in forage quality of rangeland species. This study aimed to compare the effects of overgrazing on forage quality of Artemisia sieberi, Zygophyllum eurypterum and Stipa barbata as dominant species... -
Biological suppression of sugarcane smut through native Trichoderma isolates increased sugarcane yield at Wonji, Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Samuel Tegene --- Ethiopian Sugar Corporation, Ethiopia Habtamu Terefe --- Haramaya University, Ethiopia Esayas Tena --- Ethiopian Sugar Corporation, Ethiopia Mashilla Dejene --- Haramaya University, Ethiopia Girma Tegegn --- Ethiopian Institute of Agricultural Research, Ethiopia Amare Ayalew --- Partnership for Aflatoxin Control in Africa (PACA), EthiopiaSmut disease is identified as the main constraint in the cultivation of sugarcane in Ethiopia. Although the country has employed a range of management strategies, none of them have resulted in ecologically safe and sustainable control. The use of Trichoderma... -
Comparison of rehabilitation methods on mechanically reconstructed soils following strip coal mining activities: effects on grass properties
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: DJ Beukes --- ARC-Soil, Climate and Water, South Africa LD Wiese --- ARC-Soil, Climate and Water, South Africa MV Kidson --- ARC-Soil, Climate and Water, South Africa F Breytenbach --- ARC-Livestock Business Division,Opencast coal mining has devastated the grassland biomes in the Mpumalanga Province of South Africa. A rain-fed rehabilitation trial on mechanically reconstructed soil, following strip coal mining, was conducted to demonstrate that the post-mining landscape can be returned to sustainable... -
Dreamers or schemers? Fears of “town capture” in a rural South African township
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Magnus Godvik Ekeland --- Radboud University, The NetherlandsRecent public corruption scandals in South Africa have created a social landscape where trust in the motives of businesspeople and politicians has sharply declined. I argue that a by-product of this is constraints on local brokers’ potential to act as... -
Making and remaking life under threat: fenceline communities in eMalahleni, Mpumalanga
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Zaakiyah Rabbaney --- University of the Western Cape, South AfricaIn fenceline communities alongside coal extraction operations in South Africa, residents experience extreme environmental, social and economic conditions that can be traced to the country’s extractivist economy and race-based capitalist logic that created informal settlements in abandoned landscapes to which... -
Pastures established on rehabilitated surface coal mined land: an assessment of forage production and implications for livestock grazing
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Emmanuel Nkosinathi Cele --- University of Pretoria, South Africa Monde Rapiya --- University of Pretoria, South Africa Wayne Sanders --- University of Pretoria, South Africa Wayne Truter --- Enterprises University of Pretoria, South AfricaCurrently, land rehabilitation best practice in South Africa is to revegetate ameliorated soil with grass mixtures. These grasses have valuable grazing potential that can deliver great benefits to livestock farmers. However, due to paucity of research and published findings, the... -
The association between fracture risk and bone mineral density in black postmenopausal women living with human immunodeficiency virus
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: C van der Merwe --- Centre of Excellence for Nutrition, North-West University, South Africa PO Ukegbu --- Centre of Excellence for Nutrition, North-West University, South Africa HS Kruger --- Centre of Excellence for Nutrition, North-West University, South Africa -
Physico-chemical variables influencing the distribution and abundance of macroinvertebrates in salt marsh habitats of the Berg River Estuary, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NT Mngomezulu --- Department of Plant Sciences, University of the Free State, South Africa N Peer --- Department of Botany and Zoology, Stellenbosch University, South Africa A Rajkaran --- Department of Biodiversity and Conservation Biology, University of the Western Cape, South Africa DA Veldkornet --- Department of Plant Sciences, University of the Free State, South AfricaMacroinvertebrates such as snails and crabs influence aspects of salt marsh structure and function through herbivory and bioturbation. However, the effects of physico-chemical variables and habitat composition on their abundance and distribution remain underexplored. This study examined the influence of...
