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The influence of level and distribution of nitrogenous fertilizer on the dry matter production of Eragrostis curvula
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N.F.G. Rethman --- Department of Agriculture and Water Supply, Republic of South Africa L.G. vanZy1 --- Department of Agriculture and Water Supply, Republic of South Africa B.H. Beukes --- Department of Agriculture and Water Supply, Republic of South Africa212 kg N/ha was the most profitable level. With the probability of poor seasons (when 106–159 kg N/ha was more profitable), the optimum level of spring fertilization being in the region of 100 kg N and the improved distribution of... -
Effect of time and rate of nitrogen application on the malting quality of barley
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: O.T. de Villiers --- Department of Agronomy and Pastures, Republic of South Africa P. C.J. Maree --- Department of Agronomy and Pastures, Republic of South Africa E.W. Laubscher --- Department of Agronomy and Pastures, Republic of South AfricaField trials were conducted to determine the effect of time and rate of single and split applications of nitrogen on various malting parameters of barley. The effect of a single low nitrogen application of 50 kg Nha−1 at sowing was... -
Kaliumvaslegging in 'n Arcadia-grond II. Vaslegging in die kleifraksie
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C.J. Steenkamp --- , Republiek van Suid-Afrika A.A. Theron --- Departement Grond- en Waterboukunde, Republiek van Suid-Afrika J.A. de Bruyn --- Departement Botanie, Republiek van Suid-AfrikaOndersoek is ingestel na die invloed van relatief lae toedienings van kalium, asook drogingstemperatuur, op die vermoë van die kleifraksie van 'n Arcadia-grond, versadig met kalsium of magnesium, om kalium vas te lê. Die verskil in reaksie tussen die behandelings... -
Controlling excessive growth in cotton by multiple applications of low concentrations of mepiquat chloride
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.C. Dippenaar --- , Republic of South Africa C.R. Nolte --- , Republic of South Africa C. Barnard --- , Republic of South AfricaExcessive vegetative growth of cotton occurs under favourable growing conditions and this contributes to yield losses. Low concentrations of mepiquat chloride (1, 1-dimethylpiperidinium chloride) were applied to vigorous, growing cotton by means of two or more sprays at different time... -
Growth, yield and grain protein content of wheat (Triticum aestivum L.) in response to nitrogen fertiliser rates, crop rotation and soil tillage
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: GA Agenbag --- Department of Agronomy, South AfricaSoil tillage affects both the profitability and sustainability of cropping systems. Minimum- and no-tillage systems are promoted because research has shown that these systems may reduce production costs and improve biological sustainability when compared to conventional systems, in which mouldboard... -
Sea level monitoring in Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: PL Woodworth A Aman T AarupA review is provided of the African sea level dataset, which is limited not only in size, especially given the great length of the African coastline, but also in quality. The review is undertaken primarily from Permanent Service for Mean... -
The profile of disability grant applicants in Bishop Lavis, Cape Town
Item type: Journal Article • Journal: South African Family Practice • Authors: T Govender --- Stellenbosch University, G Mji --- Centre for Rehabilitation Studies,Background: Disability grants in South Africa increased from 600 000 in 2000 to almost 1.3 million in 2004. This rise can be attributed to the HIV/AIDS epidemic, South Africa's high rate of unemployment and possibly an increased awareness of constitutional... -
InfoInternet for education in the Global South: A study of applications enabled by free information-only internet access in technologically disadvantaged areas
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Johanna Johansen --- , Norway Josef Noll --- , Norway Christian Johansen --- , NorwayThis paper summarizes our work on studying educational applications enabled by the introduction of a new information layer called InfoInternet. This is an initiative to facilitate affordable access to internet-based information in communities with network scarcity or economic problems from... -
Factors that influence Africa’s refusal and discontinuation of mobile applications use
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Chinedu Wilfred Okonkwo --- , South Africa Magda Huisman --- , South Africa Estelle Taylor --- , South AfricaThe development, adoption, and use of mobile applications (mobile apps) in Africa are growing rapidly. Some of these mobile apps have gained widespread acceptance, while others have not due to discontinued use and absolute rejection. This study aims to investigate...