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The Application of Inorganic Fertilisers to Conditioned Pinus radiata Prior to Lifting as a Means of Improving Root Growth Capacity

Item type: Journal Article • Journal: South African Forestry Journal • Authors: D. G.M. Donald --- ,

A modified root growth capacity technique was used to evaluate the effect of the application of different types and quantities of fertilisers on the root growth capacity (RGC) of conditioned Pinus radiata seedlings. The experiment indicates that 0,05 g N...

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A comparison of highveld fodders and fodder flows for growing out long yearling steers

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.O. Grunow --- Department of Plant Production, P.A. Pieterse --- Department of Plant Production, D.E. Borlinghaus --- ,

A fodder flow/animal experiment 40,8 ha in extent (7,5 ha irrigated), with 19 paddocks, was carried out over a two and a half year period.

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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...

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Die ekonomiese implikasies van bosverdigting en bosbeheer soos van toepassing op ‘n speenkalfproduksiestelsel in die doringbosveld van die Molopo‐gebied

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: A. Moore --- , A. Odendaal --- ,

Daar bestaan ‘n dringende behoefte aan ekonomies geregverdigde kostes wat as riglyne kan dien vir bosbeheer in die Molopo‐gebied. In hierdie referaat word so ‘n bedrag beraam.

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A consideration of veld condition assessment techniques for commercial livestock production in South Africa

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.M. Tainton --- Department of Grassland Science,

A number of procedures have been developed for the evaluation of veld condition in a variety of vegetation types in South Africa. These include both agronomic and ecologically based methods, about which there still remain a great deal of controversy...

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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...

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‘n oorsig oor staande hooi in die sentrale grasveld met spesiale verwysing na digit aria eriantha

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.S. Dannhauser --- Departement Landbou en Watervoorsiening,

‘n Literatuuroorsig oor die gebruikswaarde van tropiese grassse as staande hooi, in die winter, word voorsien. Die invloed van klimaat op die keuse van spesies en bestuur van die grasse, gedurende die voorafgaande groeiseisoen, word bespreek. Meer onlangse gegewens oor...

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The effect of severe drought and management after drought on the mortality and recovery of semi‐arid grassveld

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture (Eastern Cape Region), G.C. Stuart‐Hill --- Department of Agriculture (Eastern Cape Region),

The False Thornveld of the Eastern Cape experienced a particularly intense drought during the 1982/83 growing season. Extensive grass mortality took place during the drought. After the drought, recovery was particularly sensitive to the post‐drought management treatment applied. Veld that...

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An evaluation of the economic viability of commercial pastoralism in the smaldeel area of the Eastern Cape

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.E. Danckwerts --- Department of Agriculture and Water Supply (Eastern Cape Region), J.B. Marais --- Department of Agriculture and Water Supply (Eastern Cape Region),

Carrying capacity models and financial data from study group farmers were used to derive attainable net revenue per ha on veld in good, moderate and poor condition. From these data, minimum farm sizes required for a reasonable standard of living...

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Relations between soil factors and herbage yields of natural grassland on sandy soils in the south‐eastern Transvaal

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agricultural Development (Transvaal Region), Republic of South Africa M. Swart --- Department of Agricultural Development (Transvaal Region), Republic of South Africa M.F. Smith --- , Republic of South Africa G.H. Wiltshire --- , Republic of South Africa

Forty systematically‐placed observation points were established in a 1.5‐ha area of floristically unifoim veld in which productivity varied spatially. At each point grass yields were determined by harvesting quadrats at eight‐week intervals during the growing season, and the volumetric water...

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Towards optimum grazing management for sheep production on crownvetch (Coronilla varia L.)

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agricultural Development (Transvaal Region), Republic of South Africa C.P. Dempsey --- Department of Agricultural Development (Transvaal Region), Republic of South Africa

The performance of wether lambs on crownvetch (Coronilla varia L.) pasture was determined for three seasons under five grazing procedures. These included continuous grazing and rotational grazing with a 7‐day period‐of stay and periods‐of‐absence of 7, 21, 35 or 49...

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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 Africa

The 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...

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A critical analysis of veld management recommendations for sourveld in the south‐eastern Transvaal

Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: D.L. Barnes --- Department of Agricultural Development (Transvaal Region), Republic of South Africa

Surveys have shown that the grazing value of veld in the south‐eastern Transvaal is well below the estimated potential. Extension efforts aimed at rectifying the situation have been unsuccessful in that most recommendations have not been acceptable to producers. An...

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Relationship between cation exchange capacity, clay content and water retention of Highveld soils

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: AstridM. Lambooy --- ,

Water in the soil is held by capillary and adsorption forces. These forces are mainly a function of clay content and mineralogy. To neglect the influence of clay mineralogy when estimating the water-holding properties of soil, implies that only a...

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Soil factors affecting tree growth and root development in a citrus orchard

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Nel --- , A. T.P. Bennie --- ,

Tree- and root-growth parameters correlated well with a number of soil properties Useful relationships were established between unconfined penetrometer resistance, air capacity (at FWC), tree growth and root development.

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Invloed van sekere grondeienskappe op matrikspotensiaal by, en tydsverloop tot, veldkapasiteit

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Beukes --- Hoëveldstreek, Departement van Landbou,

Veldkapasiteit (VK) is bepaal op 5x5 m-persele op verskeie gronde in Wes-Kaapland. Tekstureel het die gronde gewissel van growwe sand tot sandklei. Gronde van die Avalon-, Dundee-, Fernwood-, Hutton-, Oakleafen Westleighvorme is gebruik. Matrikspotensiaal (ψm) is gemonitor met kwiktensiometers, terwyl...

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Die invloed van swartpunt by gars (Hordeum distichon) op ontkieming en α-amilase-aktiwiteit

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: P. C.J. Maree --- Departement Akkerbou en Weiding, A. L.P. Caims --- Departement Akkerbou en Weiding,

Gesonde garssaad en swartpuntgarssaad vanaf verskillende lokaliteite is vergelyk. Die ontkiemingsenergie van gesonde saad was na een maand beduidend beter as die van swartpuntsaad. Na 'n opbergingperiode van twee tot drie maande het geen verskille in ontkiemingsenergie en -kapasiteit meer...

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Empinese verwantskappe tussen veldkapasiteit en sekere fisiese grondeienskappe

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Beukes --- Hoëveldstreek, Departement van Landbou en Watervoorsiening,

Veldkapasiteit (VK) is in situ bepaal op verskeie gronde in Wes- Kaapland. Grondtekstuur het gewissel van sand tot sandklei. Veldkapasiteit is op vyf dieptes bepaal en het gevarieer van 4,9% tot 27,2% op massabasis. Matrikspotensiaal by VK het gewissel van...

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A proposed mechanism for the volatilization of ammonia from fertilized neutral to alkaline soils

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.C. du Preez --- Department of Soil Science, R. du T. Burger --- Department of Soil Science,

Ammonia volatilization from five soils, ranging in clay content from 7,6 to 49,9%, were determined after pH values of the soils were adjusted to 8,0. Ammonium sulphate, limestone ammonium nitrate, urea, monoammonium phosphate and diammonium phosphate were applied on the...

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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...

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Variations in floristic and palatability composition, yield of veld and of soil characteristics on a paddock scale

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.L. Barnes --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa G.D. Kotzé --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa B.H. Beukes --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa C. Kohlmeyer --- Department of Agriculture and Water Supply (Transvaal Region), Republic of South Africa

Five parallel 900-m line-transects were laid out 100 m apart in relatively homogeneous veld. Floristic composition, yields of dry matter, soil forms and series, effective depth, clay content of the top and subsoil, and the pH of the topsoil were...

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Risk analysis of wheat production in the central Orange Free State using a growth model

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A. Singels --- Department of Agrometeorology, Republic of South Africa J.M. de Jager --- Department of Agrometeorology, Republic of South Africa

A wheat crop growth model (Singels, 1983) was refined and used to calculate annual grain yield from weather data for 45 seasons in the Bloemfontein area. Five different levels of profile-available water capacity were used as soil input parameter. Other...

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Comparison of methods for estimating cation exchange capacity of orchard soils

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Marie Conradie --- , Republic of South Africa W. A.G. Kotze --- , Republic of South Africa

Various methods for estimating soil cation exchange capacity (CEC) were compared. CEC obtained by the sum of extractable cations and the Adams-Evans buffer method were considerably higher than those obtained by saturation and displacement of either NH4 + or Na+...

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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 Africa

Cation 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...

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Die verwantskap tussen maksimum nitrifikasietempo en relevante eienskappe van gronde vanaf die sentrale besproeiingsgebiede in Suid-Afrika

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D.J. Laubscher --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika

Die oogmerk van die studie was om die verwantskappe tussen maksimum nitrifikasietempo (Kmaks) en relevante eienskappe van die gronde vanaf die sentrale besproeiingsgebiede uit te wys. Die verloop van nitrifikasie is in agt gronde, afkomstig van die gebiede, gemonitor na...

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Urease-aktiwiteite in gronde van die sentrale besproeiingsgebiede in Suid-Afrika

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: F. P.J. Thormählen --- Departement van Grondkunde, Republiek van Suid-Afrika C.C. du Preez --- Departement van Grondkunde, Republiek van Suid-Afrika

Die oogmerk met die studie was om die omvang van urease-aktiwiteite in die besproeide gronde vas te stel en watter grondparameters dit beïnvloed. Die verloop van hidrolise is in agt gronde, afkomstig van die sentrale besproeiingsgebiede, gemonitor na toediening van...

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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 Africa

The 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...

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The effect of soil compaction on the water retention characteristics of soils in forest plantations

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: CW Smith --- , MA Johnston --- , SA Lorentz --- ,

A study was carried out to evaluate the relative effects of soil compaction on the water retention characteristics of a range of soils in forest plantations in the summer rainfall regions of South Africa. In all cases compaction resulted in...

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Ceramic suction samplers: A reliable method for extracting soil solutions for analysis

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Grobler --- Department of Plant Production and Soil Science, South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa J.G. Annandale --- Department of Plant Production and Soil Science, South Africa

Ceramic samplers are used to extract soil solutions at different depths from the soil profile for chemical analysis. The advantage of this method is that samples can be taken at any time provided that the soil water potential is high...

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Retention of applied phosphorus by the benchmark soils of Lesotho and quantification of their phosphorus retention indices

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- Faculty of Agriculture, Lesotho

This study was conducted with the objective of determining and quantifying the capacity of Lesotho's benchmark soils to retain applied P. The soils were incubated with a range of P levels for a period of 42 days, whereafter P retention...

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Relations between phosphorus retention parameters and some other properties of benchmark soils in Lesotho

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: S.F. Molete --- Department of Soil, Crop and Climate Sciences, South Africa C.C. du Preez --- Department of Soil, Crop and Climate Sciences, South Africa M.V. Marake --- , Lesotho

The benchmark soils of Lesotho are characterized by high P retention and this aspect should be accommodated in fertilization programmes. This together with long procedures for determination of P retention parameters and a lack of information on the relations between...

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Relationships between soil buffer capacity and selected soil properties in a resource-poor farming area in the Mpumalanga Province of South Africa

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. Jansen van Rensburg --- Department of Plant Production and Soil Science, South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa D.J. Beukes --- , South Africa

In this study, the soil buffer capacity (soil BC) was measured for 80 topsoil samples of the most dominant soil forms in a small-scale farming area. Soils used in the study ranged from weakly to strongly buffered, with soil BC...

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Assessing the potential soil acidification risk under dryland agriculture in the Mlondozi district in the Mpumalanga Province of South Africa

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H.G. Jansen van Rensburg --- Department of Plant Production and Soil Science, South Africa A.S. Claassens --- Department of Plant Production and Soil Science, South Africa D.J. Beukes --- , South Africa H.L. Weepener --- , South Africa P.J. Beukes --- , South Africa

The farming community in the Mlondozi district in the Mpumalanga Province of South Africa has been part of a government liming intervention with the objective to ameliorate the serious soil acidity problem in the district. The current study was undertaken...

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Selected soil properties as indicators of soil water regime in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: BT Kuenene --- Department of Soil, Crop and Climate Sciences, South Africa CW van Huyssteen --- Department of Soil, Crop and Climate Sciences, South Africa PAL Le Roux --- Department of Soil, Crop and Climate Sciences, South Africa

The morphological features and physicochemical properties of 14 soil profiles, representing the major soil types, were studied in the Cathedral Peak VI catchment of KwaZulu-Natal, South Africa. The soils are characterised by a high organic carbon content in the topsoil,...

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Phytochemical content, antioxidant capacity and physicochemical properties of pomegranate grown in different microclimates in South Africa

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Asanda Mditshwa --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa OlaniyiA Fawole --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa Fahad Al-Said --- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultanate of Oman Rashid Al-Yahyai --- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultanate of Oman UmezuruikeL Opara --- Postharvest Technology Research Laboratory, South African Research Chair in Postharvest Technology, Faculty of AgriSciences, South Africa

We investigated the antioxidant and physicochemical properties of pomegranate (Punica granatum cv. Bhagwa) fruit grown in three microclimates in South Africa. The physicochemical properties of fruit peel and arils differed among the growing locations, including weight and redness color of...

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RATE OF EROSION IN THE CATCHMENT OF THE BULBERGFONTEIN DAM NEAR REDDERSBURG IN THE ORANGE FREE STATE

Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: J.S. Ie Roux --- Department of Geography, South Africa Z.N. Roos --- Department of Geography, South Africa

The volume of sediment in the Bulbergfontein Dam was computed after mapping the area of the dam and ascertaining the depth of the sediment by digging and augering. The watershed of the impoundment had been delimited by means of aerial...

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Correlates of stocking rate and overgrazing in the Leliefontein Communal Reserve, central Namaqualand

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: S.W. Todd M.T. Hoffman

We investigate the correlates of stocking rate in the Leliefontein communal reserve and attempt to provide a mechanistic explanation of the controlling factors. We further speculate on how high stocking rates are maintained in relation to the current state of...

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The effects of topo-edaphic variables and cultivation on the woody vegetation of Weenen Nature Reserve, KwaZulu-Natal

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: L Breebaart TG O'Connor JC Hughes CD Morris IA Rushworth

The soil types and woody vegetation of Weenen Nature Reserve (WNR), KwaZulu-Natal, were described. Mispah, overlying shale, and Shortlands, overlying dolerite were the most common of 18 the soil forms encountered. Six vegetation types were identified by TWINS PAN which...

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The influence of tree density on the grass layer of three semi-arid savanna types of southern Africa

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: CGF Richter HA Snyman GN Smit

The influence of bush density on the grass component of the herbaceous layer was investigated for three savanna veld types (Molopo Thornveld, Mixed Vaalbos Thornveld, and the Eastern Grass and Bushveld) in the Northern Cape and North-West Province of South...

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A study of animal production under different grazing regimes in the False Upper Karoo at Grootfontein

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PCV du Toit

Three systems of animal production on the fragile Karoo veld, i.e. multi-paddock rotational grazing, pauci-paddock rotational grazing and continuous grazing were studied. Of these systems, multi-paddock rotational grazing gave the best results with continuous stocking resulting in the worst. All...

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Kudu foraging behaviour: influenced by animal density?

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C van der Waal

In deciduous savanna a marked decline in browse availability characterises the late dry season and apparently regulates populations of large browser species such as kudu. The dry season utilisation patterns of two woody species, Acacia tortilis and Boscia albitrunca, in...

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The relation between herbivore density and relative resource density at the landscape level: Kudu in semi‐arid savanna

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C. Fabricius --- , Republic of South Africa

Ecological theory can help range scientists to understand the determinants of ecological animal density or, in range management terms, ‘carrying capacity’. The relation between the relative density of resources and herbivore density is illustrated by regressions of the ecological density...

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Defoliation patterns of three grass species in sourveld grazed by cattle and sheep

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.B. Hardy --- , Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa C.D. Morris --- , Republic of South Africa

A point‐based technique was used to determine the effects of grazing, due to stocking rate and cattle‐to‐sheep ratio, on the defoliation pattern of three grass species. At each of 100 systematically located points per grazing treatment the nearest plant of...

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An analysis of a stocking rate trial at Chobela, southern Mozambique

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.R. Timberlake --- , Mozambique

An analysis is presented of data from a stocking rate trial carried out in 1962–1963 at Chobela Livestock Station in southern Mozambique. The data set had limitations but an attempt was made to draw any conclusions possible for management. Data...

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Diet selection by sheep and goats in the Arid Karoo

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- Department of Agriculture, Republic of South Africa C.D. Blom --- Department of Agriculture, Republic of South Africa W.F. Immelman --- Department of Agriculture, Republic of South Africa

The diet selected by Afrino, Dorper and Merino sheep, and Angora goats was studied in the Arid Karoo at Carnarvon. The diets selected by these small stock species and breeds was established through breed by breed comparisons, with a view...

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Diet selection by sheep and goats in the Noorsveld

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- Department of Agriculture, Republic of South Africa C.D. Blom --- Department of Agriculture, Republic of South Africa

The diet selection of Angora and Boer goats, and Dorper and Merino sheep was studied in the Noorsveld to ascertain differences in their food preferences. This information will facilitate the identification of possible goat and sheep combinations to improve the...

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The grazing index method of range condition assessment

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- Department of Agriculture, Republic of South Africa

Owing to the difficulty of examining succession theory in the Karoo, it is suggested the ecological index method (EIM), be replaced by the grazing index method (GIM), through the introduction of grazing index values (GIV) for Karoo plant species. The...

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Calculating stocking rates for game ranches: Substitution ratios for use in the Mopani Veld

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: B. Dekker --- Northern Province Department of Agriculture, Republic of South Africa

Determination of carrying capacity for mixed‐ or multi‐species grazing systems is complex. Commonly, each species is compared to the standard large stock unit (LSU) used in conventional agriculture. However, this approach does not allow for ecological separation, and thus overlooks...

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Description of a method for assessing veld condition in the Karoo

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P.C.V. du Toit --- , Republic of South Africa

In the past, veld condition in the Karoo was assessed according to the ecological index method. This has recently been replaced by the grazing‐index method. The principles governing the method of botanical survey remain the same, but this methodology has...

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Perspective article: The evolving use of stocking rate indices currently based on animal number and type in semi‐arid heterogeneous landscapes and complex land‐use systems

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M.J.S. Peel --- , Republic of South Africa H. Biggs --- , Republic of South Africa P.J.K. Zacharias --- Department of Range and Forage Resources, Republic of South Africa

Methods of determining stocking rate based on metabolic mass, animal type and biomass are reviewed in the context of equilibrial/disequilibrial paradigms. In South Africa, the calculation of ‘carrying capacity’ is based on conversion of animal species to metabolic mass equivalents...

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Post-wildfire regeneration of rangeland productivity and functionality – observations across three semi-arid vegetation types in South Africa

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Johannes AD Breedt --- School of Biological Sciences, South Africa Niels Dreber --- School of Biological Sciences, South Africa Klaus Kellner --- School of Biological Sciences, South Africa

Wildfires can have significant impacts on rangeland productivity and functionality causing substantial economic losses to affected farmers. In August 2011, such wildfires swept through the North West province of South Africa, destroying large areas of grazing and farm infrastructure. There...

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Perceptions of climate change and barriers to adaptation amongst commonage and commercial livestock farmers in the semi-arid Eastern Cape Karoo

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Claudette Muller --- Department of Environmental Science, South Africa Sheona E Shackleton --- Department of Environmental Science, South Africa

Climate change is expected to adversely affect agriculture in South Africa. A rise in variable and unfavourable conditions is likely to surpass the limits of current coping mechanisms of farmers, compelling them to implement more resilient adaptive measures to decrease...

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Savanna browse production. 1: Determinants and measurement

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caryn A Penderis --- School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, South Africa

With the rapid expansion of wildlife ranching and conservation in South African savannas and the resultant increase in multi-species grazing and browsing systems, information on browse production potential is essential for determination of carrying capacity. This study, conducted on three...

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Savanna browse production. 2: Prediction

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Caryn A Penderis --- School of Life Sciences, South Africa Kevin P Kirkman --- Grassland Science, South Africa

Browsing herbivores are generally highly selective feeders, selecting for new shoots and young plant material. Determinations of browser carrying capacity are then greatly inflated when based on available browse biomass estimates. Our study was initiated with the aim of modelling...

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Technical and institutional capacity in local organisations to manage decentralised forest resources in Uganda

Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: N. Turyahabwe C.J. Geldenhuys S. Watts A.Y. Banana

Uganda is one of the sub-Saharan African countries that has devolved the management of forest resources. Meaningful devolution, however, requires that local governments and other community organizations should have capacity in terms of adequate and competent human resources, finance, information,...

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Staining roots to determine root growth potential of Pinus taeda

Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: Janusz Zwolinski --- Forestry Programme, South Africa CurtM. Peterson --- Department of Botany and Microbiology, USA Colin Dyer --- , South Africa

Root growth potential (RGP) consists of two components: elongation of existing roots and initiation of new roots. Currently, RGP is determined on planting stock from which any “white roots” present at the start of the test are removed. This study...

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Community Centred Learning: A Pathway to Community Engagement

Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lebogang Lorraine Phiri --- University of South Africa, South Africa Natasha Hendricks --- Medical Research Council, South Africa Mohamed Seedat --- University of South Africa, South Africa

We report on the experiences of participants on a course which represented a pathway to community engagement. The 76 participants (20 males, 46 females), from two low-income South African communities, were part of a multi-lingual group representing English, Africans, isiZulu...

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Research Agenda to Facilitate Community Participation In HIV Vaccine Research: A Participatory Approach

Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Anthea Lesch --- Stellenbosch University, South Africa Sagri Singh --- International AIDS Vaccine Initiative Country and Regional Programmes, USA Zuhayr Kafaar --- Stellenbosch University, South Africa Leslie Swartz --- Stellenbosch University, South Africa Alexandre Menezes --- International AIDS Vaccine Initiative Country and Regional Programmes, USA

This article reports on a participatory process to generating a research agenda to guide research on community participation in HIV vaccine research. Community members representing stakeholder parties involved in the HIV vaccine research enterprise were invited to participate in the...

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Formative evaluation of the STAR intervention: improving teachers’ ability to provide psychosocial support for vulnerable individuals in the school community

Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Ronél Ferreira --- Department of Educational Psychology, South Africa Liesel Ebersöhn

The article describes the pilot phase of a participatory reflection and action (PRA) study. The longitudinal investigation explores teachers’ ability to provide psychosocial support within the context of HIV/AIDS following an asset-based intervention. The study ensued from our desire to...

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Influence of salinity and cadmium on the survival and osmoregulation of Callianassa kraussi and Chiromantes eulimene (Crustacea: Decapoda)

Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M Thwala --- Department of Zoology and Coastal Research Unit of Zululand, South Africa BK Newman --- Department of Zoology and Coastal Research Unit of Zululand, South Africa DP Cyrus --- Department of Zoology and Coastal Research Unit of Zululand, South Africa

This study investigated the influence of salinity and cadmium on the survival and osmoregulatory capability of two decapod crustaceans, Callianassa kraussi and Chiromantes eulimene. Callianassa kraussi was able to survive in salinities of 5–55 over 96 h, whilst C. eulimene...

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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...

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Wellness programme and health policy development at a large faith-based organisation in Khayelitsha, South Africa

Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: ElizabethD Arend

This paper presents a case study of wellness programme and health policy development based on an HIV/AIDS organisation's Khayelitsha site in the Western Cape Province, South Africa. The study examines the different challenges that the organisation faces in relation to...

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Can brush-cutting of Pteronia paniculata improve the composition and productivity of veld in the Succulent Karoo, South Africa?

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: N Saayman --- Department of Agriculture: Western Cape, South Africa CD Morris --- Agricultural Research Council, South Africa MB Hardy --- Department of Agriculture: Western Cape, South Africa JC Botha --- Department of Agriculture: Western Cape, South Africa

Pteronia paniculata is an indigenous, unpalatable shrub that invades mismanaged Karooveld, resulting in degraded rangelands with low species diversity and grazing potential. We conducted a series of trials in the Succulent Karoo Randteveld near Barrydale to determine if the uniform...

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Prediction models for estimating available fodder of two savanna tree species (Acacia dudgeoni and Balanites aegyptiaca) based on field and image analysis measures

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: P Savadogo B Elfving

Browse production is difficult to measure non-destructively without some level of subjectivity combined with a lack of accuracy and reproducibility. This study examined the possibility of using ground-based photographs to estimate browse production. Thirty five sample trees of Acacia dudgeoni...

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Social sciences and research ethics in developing countries: The perspective from Nigeria

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Emmanuel M. Akpabio --- Department of Geography and Regional Planning, Nigeria Idorenyin F. Esikot --- Department of Philosophy, Nigeria

This study seeks to show how social science-related disciplines in Nigerian universities understand and incorporate ethical principles in research settings within the framework of general institutional practices. We used the University of Uyo, Nigeria, to specifically and empirically explore these...

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Industrial development for Africa: Trade, technology and the role of the state

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Padmashree Gehl Sampath --- United Nations Conference on Trade and Development, Switzerland

The discourse on the nature of the developmental state and industrial policy options for Africa has become central to debates on how to promote overall growth and prosperity in the continent. This article poses a fundamental question on the nature...

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Foreign direct investment and local technological capabilities in least developed countries: some evidence from the Tanzanian manufacturing sector

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Bitrina Diyamett --- Science, Technology and Innovation Policy Research Organisation (STIPRO), Tanzania Musambya Mutambla --- Science, Technology and Innovation Policy Research Organisation (STIPRO), Tanzania

Foreign direct investment has been found to be one of the very important ways of building local technological capabilities for developing countries, and an important channel through which international diffusion of knowledge and technology takes place. While this has been...

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The Nature of the South African Corporate Economy: A need to review company objectives?

Item type: Journal Article • Journal: De Ratione • Authors: D Botha --- University of Cape Town,

The maximisation of shareholders’ wealth as the primary goal of the firm is the cornerstone of modern financial theory which has its source mainly from USA. The South African corporate economy has significantly different characteristics compared with that of the...

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Technological capacity and other determinants of economic performance in African countries: Panel data evidence

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Albert A. Okunade --- Department of Economics, USA

The determinants of aggregate economic performance in African countries are economic, institutional and political. To date, rarely has research included a specific conceptual measure of technological index among the core determinants. Consequently, for the first time in the economic development...

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Locating community participation in a water supply project—the Galanefhi Water Project (Eritrea)

Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Solomon Haile Gebremedhin --- Department of Economic Development, Central Region, Eritrea Francois Theron --- School of Public Management and Planning, University of Stellenbosch,

Water projects, like sustainable development projects in general, often tend to become unsustainable because they are guided by top-down strategies which exclude the input, influence and ownership of projects by their beneficiaries. For attaining sustainable development, the social capital of...

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Measuring and reporting on energy poverty: insights from West African countries

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Emmanuel W. Ramde --- Department of Mechanical Engineering, Ghana Patrick Nussbaumer --- United Nations Industrial Development Organization (UNIDO), Austria Morgan Bazilian --- United Nations Industrial Development Organization (UNIDO), Austria

A reliable and comprehensive energy information base is required to set targets, design policies and programmes, as well as to enable citizens to make informed choices. Adequate national capacity to track progress towards universal modern energy access represents an especially...

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The deterioration of production schedules during unforeseen disruptions

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: J.M. Ikome --- Department of Industrial Engineering, South Africa M.G. Kanakana --- Department of Industrial Engineering, South Africa S.P. Ayodeji --- Department of Industrial Engineering, South Africa

In most real-world environments, production scheduling is an ongoing process where the presence of a variety of unforeseen disruptions is usually inevitable, and continually forces reconsideration and revision of pre-established schedules. Many of the approaches developed to solve the problem...

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Strengthening Capacity for Agribusiness Development and Management in Sub-Saharan Africa

Item type: Journal Article • Journal: Africa Journal of Management • Authors: Suresh Chandra Babu --- Capacity Strengthening Program, USA Rupak Manvatkar --- World Food Programme, Italy Shashidhara Kolavalli --- Ghana Strategy Support Program, Ghana

In sub-Saharan Africa, agribusiness has a major role to play in the transformation of the agricultural sector. The demand for high-value food products is increasing, creating an opportunity for the production and export of these goods. To capture the benefits...

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Design of a hand water pump using a quick-return crank mechanism

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: C. A. Okoronkwo --- Department of Mechanical Engineering, Nigeria B. O. Ezurike --- Department of Mechanical Engineering, Nigeria R. Uche --- Department of Mechanical Engineering, Nigeria J. O. Igbokwe --- Department of Mechanical Engineering, Nigeria O. N. Oguoma --- Department of Mechanical Engineering, Nigeria

The detailed design procedure for a quick-return mechanism hand water pump is presented. The system designed is basically a modification to reciprocating lift pumps also known as India mark III. The modified pump is operated by the up and down...

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Consent by children: considerations when assessing maturity and mental capacity

Item type: Journal Article • Journal: South African Family Practice • Authors: Y Havenga --- Adelaide Tambo School of Nursing Science, South Africa MA Temane --- Department of Nursing Science, South Africa

Health care providers are required to know and apply legal, ethical and professional requirements when obtaining consent from children. Central to obtaining consent from children is the ability to assess and arrive at a clinical judgement about the child’s maturity...

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South African indigenous fruits – Underutilized resource for boosting daily antioxidant intake among local indigent populations?

Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Daniela Amalia Kucich --- Department of Chemistry, South Africa Merrill Margaret Wicht --- Department of Chemistry, South Africa

Consuming more than seven portions of fruit and vegetables daily substantially lowers the risk of mortality from any cause, yet many South Africans living below the poverty line have a very low or even zero intake of fruit and vegetables...

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The sensitivity of Afromontane tarns in the Maloti-Drakensberg region of South Africa and Lesotho to acidic deposition

Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JA Dunnink --- Centre in Water Research and Development (CiWaRD) and Department of Geography, South Africa CJ Curtis --- Centre in Water Research and Development (CiWaRD) and Department of Geography, South Africa JP Beukes --- Unit for Environmental Sciences and Management, South Africa PG van Zyl --- Unit for Environmental Sciences and Management, South Africa J Swartz --- Unit for Environmental Sciences and Management, South Africa

Despite their remoteness from sources of atmospheric pollutant emissions, the Afromontane tarns in the Maloti-Drakensberg region are perfect candidates to study the negative effects of acidifying atmospheric pollution, because mountain lakes are widely recognised as sentinel ecosystems, unimpacted by direct...

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Domestic Resource Mobilization in Africa: State, Capacity Imperatives and Policy Actions

Item type: Journal Article • Journal: Africa Journal of Management • Authors: Emmanuel Nnadozie --- The African Capacity Building Foundation, Zimbabwe Thomas Munthali --- The African Capacity Building Foundation, Zimbabwe Robert Nantchouang --- The African Capacity Building Foundation, Zimbabwe Barassou Diawara --- The African Capacity Building Foundation, Zimbabwe

In Agenda 2063 and Agenda 2030, Africa has its major development aspirations defined in the broader global and continental economic development context. Implementation of the two Agendas calls for substantial financial resources at a time when the global development finance...

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Focusing on monofilament nets while overlooking the priorities of artisanal fisheries governance in Senegal

Item type: Journal Article • Journal: African Journal of Marine Science • Authors: D Thiao --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal A Mbaye --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal M Dème --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal HD Diadhiou --- Centre de Recherches Océanographiques de Dakar-Thiaroye (CRODT), Senegal

Despite its legal prohibition since 1998, the nylon monofilament net is still widely used in Senegalese artisanal fisheries. To achieve a complete ban on monofilament use, it is necessary to understand the main arguments for its continued use and what...

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The continuing lack of ornithological research capacity in almost all of West Africa

Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Will Cresswell --- Centre for Biological Diversity, University of St Andrews, UK

West Africa has high bird diversity and is a crucial non-breeding area for over one-third of European breeding species, yet local capacity for ornithological research and so targeted bird conservation is perceived to be limited. I reviewed all the published...

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Trends and themes in African ornithology

Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Colin M Beale --- Department of Biology, UK

Ornithology in Africa has a long history. I review trends in the ornithological literature since 1990 within the context of the 14th Pan-African Ornithological Congress. Using full text searches of papers on PubMed® and abstracts from main ornithological journals I...

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Determinants of market participation and marketing channels in smallholder groundnut farming: A case of Mudzi district, Zimbabwe

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Nelson Mango --- International Centre for Tropical Agriculture, Zimbabwe Clifton Makate --- International Centre for Tropical Agriculture, Zimbabwe Nicola Francesconi --- Technical Center for Agricultural and Rural Cooperation (CTA), The Netherlands Matthias Jager --- International Centre for Tropical Agriculture (CIAT), Colombia Mark Lundy --- International Centre for Tropical Agriculture (CIAT), Colombia

This paper investigates the factors that are associated with market participation and choice of marketing channels by smallholder groundnut farmers in a semi-arid district of Zimbabwe. It contributes to the existing body of knowledge on groundnuts, especially the marketing aspect...

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Seasonal changes in pasture biomass and grazing behaviour of cattle in the Guinea Savanna agroecological zone of Ghana

Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Maxwell Akapali --- Department of Animal Science, Ghana Terry Ansah --- Department of Animal Science, Ghana Ibn Iddriss Abdul-Rahman --- Department of Animal Science, Ghana Benjamin Alenyorege --- Department of Animal Science, Ghana Bernard N Baatuuwie --- Department of Forestry and Forest Resources Management, Ghana

Spatial and temporal availability of pasture vegetation and cattle grazing behaviour in three seasons (intermediate season [IM], peak season [PS] and dry season [DS]) in the Guinea Savanna agroecological zone of Ghana was examined. The frequency of occurrence of three...

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Yield of hydroponically grown tomato (Solanum lycopersicon) as affected by different particle sizes of sawdust

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maboloke A Maatjie --- Department of Agriculture and Animal Health, South Africa Martin M Maboko --- Agricultural Research Council–Vegetable and Ornamental Plants, South Africa David M Modise --- Department of Agriculture and Animal Health, South Africa

The particle size of a growing medium is one of the most important aspects in growing crops hydroponically. A study was conducted to determine the effect of particle size of sawdust as a substrate on tomato yield, in a non-temperature-controlled...

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Climate change and adaptation-induced engineering design and innovations in water development projects in Africa

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Berhanu F. Alemaw --- Department of Geology, Botswana Nako M. Sebusang --- Department of Civil Engineering, Botswana

In this paper, a framework for best practice for incorporating climate change and adaption in Africa is presented from mainly the water resources design and management perspectives to chart systematically ways of incorporating climate change in engineering design of water...

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Impact of shorebird predation on intertidal macroinvertebrates in a key North African Atlantic wintering site: an experimental approach

Item type: Journal Article • Journal: African Journal of Marine Science • Authors: L Joulami --- Faculty of Sciences Ben M’sik, Morocco R El Hamoumi --- Faculty of Sciences Ben M’sik, Morocco Z Daief --- Faculty of Sciences Ain Chock, Morocco H Bazairi --- Faculty of Sciences, Morocco RJ Lopes --- Centro de Investigação em Biodiversidade e Recursos Genéticos (CIBIO), InBio Laboratório Associado, Portugal

Shorebirds, as migratory aquatic birds and top predators in intertidal ecosystems, can be affected by global environmental changes and escalations in local impacts on coastal lagoons and estuarine trophic networks. Many shorebirds winter in North African Atlantic coastal sites, most...

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Student’s perception of engineering design for competitiveness in Africa: The case of Tanzania, East Africa

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Lawrence Joseph Kerefu --- Department of Mechanical Engineering, Tanzania Juliana Zawadi Machuve --- Department of Mechanical and Industrial Engineering, Tanzania

Engineering is vital for addressing basic human needs, improving the quality of life and creating opportunities for sustainable prosperity at local, regional, national and global levels. However, Africa faces a shortage of engineers arising from the declining interest and enrolment...

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Foreign direct investment inflows, intellectual property rights and economic freedom: Empirical evidence from middle- and low-income countries

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Saïd Hammami --- Laboratoire d’Economie et de Gestion Industrielle LEGI, Ecole Polytechnique de Tunisie, Tunisia

This study examines the impact of intellectual property rights (IPRs) on foreign direct investment (FDI) inflows, using macro data over a panel of 39 middle- and low-income countries as classified by the World Bank. Empirical assessment was made in order...

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Tourism resources and carrying capacity of scenic tourism areas based on forest ecological environment

Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Qiong Sun --- , China Naicong Zhang --- , China Zheng Liu --- , China Bin Liao --- , China

The development of society promotes the development of forest scenic tourism areas. In order to further realise the scientific and rational development of forest scenic tourism areas, it is necessary to analyse their tourism resources and carrying capacity. This paper...

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Effect of land terracing on soil physical properties across slope positions and profile depths in medium and high altitude regions of Rwanda

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Aloys Fashaho --- , Rwanda George M Ndegwa --- , Rwanda Joyce J Lelei --- , Kenya Amos O Musandu --- , Kenya Samuel M Mwonga --- , Kenya

Although land terracing is promoted as a management practice for effective soil conservation in hilly areas, construction of terraces causes changes in soil properties. This study evaluated the effect of land terracing on some soil physical properties across slope positions...

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Sustainable shellfish aquaculture in Saldanha Bay, South Africa

Item type: Journal Article • Journal: African Journal of Marine Science • Authors: A Santa Marta --- , United Kingdom JG Ferreira --- , United Kingdom GC Pitcher --- , South Africa J Lencart e Silva --- , United Kingdom

The carrying capacity for bivalve shellfish culture in Saldanha Bay, South Africa, was analysed through the application of the well-tested EcoWin ecological model, in order to simulate key ecosystem variables. The model was set up using: (i) oceanographic and water-quality...

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The effect of intellectual property protection on innovation: Empirical analysis of developing countries panel

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Saïd Hammami --- ,

This paper aims to test the impact of intellectual property protection reforms on the dynamic of technological progress within sampled developing countries. The dependency of the Intellectual Property Rights (IPR’s) rule enforcement on the stage of economic development is broadly...

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Analysis of offshore wind energy potential for power generation in three selected locations in Nigeria

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Mamman Rabiu Onoruoiza --- , Nigeria Oyewole Adedipe --- , Nigeria Sunday Albert Lawal --- , Nigeria Oluwafemi Ayodeji Olugboji --- , Nigeria Victor Chiagozie Nwachukwu --- , Nigeria

The rise in the global carbon footprint arising from fossil fuel sources has necessitated the need to explore sustainable and eco-friendly sources of energy. Wind as a source of renewable energy has been underutilized in Nigeria and this study is...

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Technology transfer and absorptive capacities in South Africa's medical device industry

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Tebogo Simon Ramaoka --- University of Johannesburg, South Africa Erika Kraemer-Mbula --- University of Johannesburg, South Africa

This paper explores South African manufacturing of medical devices, focusing on firms’ acquisition of imported and domestic technologies through technology transfer and their related absorptive capacity. Using an exploratory sequential mixed-methods approach, this paper demonstrates that technology transfer does occur...

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Impact of liming on extractable phosphorus, exchangeable base cations, and effective cation exchange capacity of eastern Free State soils

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: HJJ van Zyl --- University of the Free State, South Africa CC du Preez --- University of the Free State, South Africa

Soil acidity can adversely affect wheat production in the eastern Free State, South Africa. Liming of the soils is therefore essential. The aim of this study was to establish whether extractable phosphorus (P), exchangeable calcium (Ca), magnesium (Mg) and potassium...

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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, Nigeria

Human 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...

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Estimating population changes in humpback whales Megaptera novaeangliae migrating past Cape Vidal, South Africa

Item type: Journal Article • Journal: African Journal of Marine Science • Authors: C Wilkinson --- Cape Peninsula University of Technology, South Africa E Seyboth --- Cape Peninsula University of Technology, South Africa J Olbers --- , South Africa E Vermeulen --- University of Pretoria, South Africa R Kramer --- WILDTRUST, South Africa K Findlay --- Cape Peninsula University of Technology, South Africa

Shore-based surveys of humpback whales Megaptera novaeangliae were performed from Cape Vidal, on the east coast of South Africa (iSimangaliso Marine Protected Area, Indian Ocean), from two independent platforms between 27 June and 7 August in 2018 and 2019, to...

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Assessment of retrained public service employees for effective performance: a professional development myth

Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Emmanuel Selemani Shindika --- President’s Office, Public Service Management, Tanzania Public Service College, Tanzania Priviledge Cheteni --- University of Fort Hare, South Africa

The public sector necessitates the development of public service managers’ competencies. However, this need has received far too little attention, particularly in terms of stakeholder management and service delivery. The case study method was used to interview seven public managers...

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Integrating seasonal forecast information with crop models to inform decision making in small-scale farming under climate variability

Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Siyabusa Mkuhlani --- Climate Systems Analysis Group, Environmental and Geographical Science Department, Faculty of Science, University of Cape Town, South Africa Farirai Rusere --- University of the Witwatersrand, South Africa Nkulumo Zinyengere --- World Bank Group, USA Olivier Crespo --- Climate Systems Analysis Group, Environmental and Geographical Science Department, Faculty of Science, University of Cape Town, South Africa

Integrating seasonal forecast information and crop models has the potential to inform farm management decisions under climate variability. The study assessed the feasibility of integrating seasonal forecast information into crop models for decision making in small-scale farming conditions in South...

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Influence of the Benguela Upwelling System on the genetic connectivity of blacktail seabream Diplodus capensis across southern Africa

Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WF Olivier --- Genetics and Microbiology, University of Pretoria, South Africa WM Potts --- Rhodes University, South Africa A-R Childs --- Rhodes University, South Africa C Santos --- Agostinho Neto University, Angola PW Shaw --- Aberystwyth University, R Henriques --- Genetics and Microbiology, University of Pretoria, South Africa

Oceanographic features such as upwelling cells and currents contribute to shaping the evolutionary history of marine fishes, including species that may be important socio-economic resources. However, the impacts of these barriers are often cryptic and may change, particularly in a...

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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 Africa

Currently, 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...

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Paclobutrazol application in eucalypt clones promotes morphological changes without affecting the physiological characteristics

Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Jenifer Nathanna Marcelino Moura --- Universidade Federal do Acre, Brazil Paulo André Trazzi --- Universidade Federal do Acre, Brazil Elsilene Thaynara Melo Sales --- Universidade Federal do Acre, Brazil Marcio Oliveira Martins --- Universidade Federal do Acre, Brazil Keveny da Silva e Silva --- Universidade Federal do Acre, Brazil Gabriel Melo Mustafa --- Universidade Federal do Acre, Brazil Barbara Valentim Oliveira --- Universidade Federal do Acre, Brazil

The aim of this study was to investigate the morphophysiology of young eucalypt clones in response to different water regimes and paclobutrazol (PBZ) concentrations applied to the soil. The experiment was conducted in a greenhouse environment at the Federal University...

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