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Die invloed van nat grondtoestande op die vrugkwaliteit van appels
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.F. Lourens --- ,Vrugontledings op appels van bome op gedeeltelik versuipte gronde gedurende die vruggroei-periode het hoër Na- en B- en laer N- en Mg-peile getoon as appels van bome op droër gronde. Die vrugte van nat persele was fermer en het hoër... -
High-density orchards improve the quality of ‘Songold’ plums from lower, more shaded canopy positions
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L. Kruger --- Department of Horticultural Science, South Africa D.M. Holcroft --- Department of Horticultural Science, South Africa M. Huysamer --- Department of Horticultural Science, South Africa N.C. Cook --- Department of Horticultural Science, South AfricaGel breakdown is a major postharvest problem in ‘Songold’ plums (Prunus salicina Lindl.) that is exacerbated in fruit harvested from lower canopy positions in large trees. Modern high-density orchards with small trees aggressively address this problem through improved light distribution... -
Evaluating the Streif index against commercial subjective predictions to determine the harvest date of apples in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Elmi Lötze --- Department of Horticultural Science, South Africa Oloff Bergh --- , South AfricaFor the local deciduous fruit industry, which mainly exports fruit, determination of the optimum physiological harvest maturity for apples to ensure high fruit quality after long-term storage is still an important goal. This is performed by a subjective determination based... -
Predicting the social consequences of orphanhood in South Africa
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: Rachel Bray --- Centre for Social Science Research, Leslie Social Science Building, Upper Campus, South AfricaThis paper examines and questions the predictions found in the academic and policy literature of social breakdown in southern Africa in the wake of anticipated high rates of orphanhood caused by the AIDS epidemic. Analysis of the logic underlying these... -
Abundance of earthworms in Nigerian ecological zones: implications for sustaining fertilizer-free soil fertility
Item type: Journal Article • Journal: African Zoology • Authors: S. O. Owa --- Department of Biological Sciences, Nigeria G. A. Dedeke --- Department of Biological Sciences, Nigeria S. O. A. Morafa --- Department of Soil Science and Farm Mechanization, Nigeria J. A. Yeye --- Department of Geography and Regional Planning, NigeriaThe abundance of earthworms in the ecological zones in Nigeria has been determined and the possibility of earthworm functions replacing both mechanized land preparation and organic fertilizers discussed. The most abundant earthworms, comprising 62 % of the population, were the... -
Minimising instability on manufacturing systems after random disruption
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: John M. Ikome --- Department of Industrial Engineering, South Africa Sesan P. Ayodeji --- Department of Industrial Engineering, South Africa Grace M. Kanakana --- Department of Industrial Engineering, South AfricaOne of the major issues in manufacturing systems is to determine how to deal effectively with unexpected disruption during production operation, (e.g. material unavailability, machine breakdown, employee absenteeism, power failure and additional resources, etc.). This paper presents a comprehensive literature... -
Operation and maintenance of back-up photovoltaic systems: An analysis based on a field study in Cameroon
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Kodji Deli --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Etienne Tchoffo Houdji --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Noel Djongyang --- Department of Renewable Energy, Higher Institute of the Sahel, Cameroon Donatien Njomo --- Environmental Energy Technologies Laboratory (EETL), Department of Physics, Faculty of Science, CameroonThis work is an analysis of the data collected from 20 photovoltaic installations all over Cameroon. The objectives are to study the causes of the breakdown of the different installations and propose maintenance strategies to solve them and to evaluate...