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Responses of Italian ryegrass to phosphorus on highly‐weathered soils
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: N. Miles --- Department of Agricultural Development, Republic of South Africa R.J. Eckard --- Department of Agricultural Development, Republic of South Africa J.M. deVilliers --- Department of Agronomy, Republic of South AfricaItalian ryegrass (Loliwn multiflorum cv. Midmar) responses to fertilizer P were studied in field experiments under irrigation on highly‐weathered ferrallitic soils at two localities in Natal. Each experiment was conducted over two seasons (1985 and 1986), the pasture being re‐established... -
A comparison of some range condition assessment techniques used in southern African grasslands
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: C.R. Hurt --- Natal Region, Department of Agricultural Development, Republic of South Africa O.J.H. Bosch --- Department of Plant Sciences, Republic of South AfricaTechniques currently used to assess range condition in the grassland biome of southern Africa are reviewed. The methods were used to calculate range condition indices from fire‐climax and climatic‐climax grassland data. These indices were then used to evaluate each method... -
The influence of lime and phosphorus on the growth of white clover on highly weathered Natal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. Miles --- , P.E. Bartholomew --- , C.I. Macdonald --- ,Results of field studies conducted on highly weathered Natal soils in which the performance of white clover (Trifolium repens cv. Regal ladino) was examined under a range of lime and P treatments applied in factorial combination, are presented. Despite adverse... -
Identification of key grass species under grazing in the Highland Sourveld of Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C.R. Hurt --- Department of Grassland Science, Republic of South Africa M.B. Hardy --- , Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaRelative abundances of rangeland species have for many years been used to index trends in range condition following the impact of grazing. All species recorded in a botanical survey are usually classified according to their assumed reaction to grazing using... -
Species responses to grazing in the Smaldeel area of the Eastern Cape1
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J.C. Martens --- , Republic of South Africa J.E. Danckwerts --- , Republic of South Africa P.J.K. Zacharias --- Department of Grassland Science, Republic of South AfricaSpecies composition of the grass layer was measured in plots selected to cover a wide spectrum of condition states in six range types. This was achieved by placing 257 sample plots along contrasting fence‐lines in adjacent plots on either side... -
Spring and autumn nitrogen fertiliser effects, with and without phosphorus, potassium and sulphur, on dairy pastures: Yield and botanical composition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: F.R. McKenzie --- Department of Natural Resources and Environment, Australia J.L. Jacobs --- Department of Natural Resources and Environment, Australia M. Ryan --- Department of Natural Resources and Environment, Australia G. Kearney --- Department of Natural Resources and Environment, AustraliaExperiments were conducted at three sites to study effects of different nitrogen (N) fertilisers (e.g. urea, ammonium nitrate, di‐ammonium phosphate and ammonium sulphate), applied at 45 kg N ha−1, with and without phosphorus (P), potassium (K) and sulphur (S), on... -
Behavioural and Emotional Development in Children of Divorce
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Lephodisa Stephen Molepo --- Tholene Sodi and Partners, Inc., South Africa Tholene Sodi --- University of Limpopo, South Africa Levison Maunganidze --- Midlands State University, Zimbabwe Pilot Mudhovozi --- University of Venda, South AfricaThis study reports on teacher perceptions of the impact of parental divorce on behaviour and emotional development in children of divorce. Participants were a purposive sampling of 80 primary school learners with parental divorce experience and a comparison group of... -
Perceived Sexual Harassment Among Female Students at a Zimbabwean Institution of Higher Learning
Item type: Journal Article • Journal: Journal of Psychology in Africa • Authors: Thelma Dhlomo --- Great Zimbabwe University, Zimbabwe Rose M. Mugweni --- Great Zimbabwe University, Zimbabwe Gwen Shoniwa --- Great Zimbabwe University, Zimbabwe Levison Maunganidze --- Midlands State University, Zimbabwe Tholene Sodi --- University of Limpopo, South AfricaThis study analysed perceived sexual harassment experiences and responses among 136 female students (aged 19 to 40) randomly drawn from an institution of higher learning in Zimbabwe. A Sexual Harassment Questionnaire (SEQ) was administered to the participants. Data were summarized... -
AIDS, order and 'best practice' in the South African workplace: managers, peer educators, traditional healers and folk theories
Item type: Journal Article • Journal: African Journal of AIDS Research • Authors: David DickinsonThis article examines the response of three medium-sized South African manufacturing companies to HIV/AIDS. It is argued that the response is heavily influenced by managerial conceptions of workplace order — sometimes divergent from industrial realities — which results in the... -
The impact of feedlot effluent on water quality and aquatic macroinvertebrate community structure in streams of the upper Vaal River catchment, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: M-N Jonker --- Centre for Aquatic Research, Department of Zoology, South Africa JHJ van Vuren --- Centre for Aquatic Research, Department of Zoology, South Africa V Wepener --- Centre for Aquatic Research, Department of Zoology, South AfricaThe impact of three intensive feedlots on aquatic macroinvertebrate community structure under high and low flows in the upper Vaal catchment was investigated. Water quality variables recorded upstream and downstream of feedlot activity include pH, dissolved oxygen, conductivity, temperature, turbidity,... -
Thermoregulation under semi-natural conditions in speckled mousebirds: the role of communal roosting
Item type: Journal Article • Journal: African Zoology • Authors: Andrew E. McKechnie --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Gerhard Körtner --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South Africa Barry G. Lovegrove --- School of Biological and Conservation Sciences, University of KwaZulu-Natal, South AfricaMousebirds (Coliiformes) exhibit well-developed communal roosting behaviour as well as a pronounced capacity for facultative hypothermic responses. We recorded body temperature (Tb)) in speckled mousebirds (Colius striatus) under semi-natural conditions in outdoor aviaries, and examined interactions between behavioural and metabolic... -
Saliva fractions from South African Russian wheat aphid biotypes induce differential defence responses in wheat
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Lintle Mohase --- Department of Plant Sciences, South Africa Bernice Taiwe --- Glen Agricultural College, South AfricaThe Russian wheat aphid (RWA), Diuraphis noxia (Kurdjomov, 1913), is a notorious pest that reduces yield in wheat. Nevertheless, the source of eliciting activity during RWA–wheat interaction has not been established. This paper reports on the isolation of eliciting activity... -
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), SenegalDespite 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... -
Biomarkers of toxicity in Clarias gariepinus exposed to sublethal concentrations of polycyclic aromatic hydrocarbons
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: TO Sogbanmu --- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, Nigeria AO Osibona --- Department of Marine Sciences, Faculty of Science, Nigeria OA Oguntunde --- Department of Anatomic and Molecular Pathology, Faculty of Basic Medical Sciences, Nigeria AA Otitoloju --- Ecotoxicology and Conservation Unit, Department of Zoology, Faculty of Science, NigeriaPhysiological, biochemical and histological indices in Clarias gariepinus broodstock, and teratogenic indices in embryos exposed to sublethal concentrations of naphthalene, phenanthrene and pyrene were investigated in 2014 using a static-renewal bioassay protocol. Phenanthrene (1.41 mg l−1) was the most toxic,... -
Flexural, water absorption and wear responses of green composites from bio-resources
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Isiaka Oluwole Oladele --- Department of Metallurgical and Materials Engineering, Nigeria Oluwaseun Olayinka Abegunde --- Department of Metallurgical and Materials Engineering, Nigeria Abdullahi Olawale Masud --- Department of Metallurgical and Materials Engineering, NigeriaThis research was carried out to produce corn husk fibre reinforced recycled waste paper-based composites using natural rubber as a binder. The paper pulp was obtained by soaking waste paper in water for 24 hours after which it was ground... -
Effect of moringa extract on the leaf anatomy and yield potential of tomato infected by Alternaria solani
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Culver Mvumi --- Department of Plant and Soil Science, South Africa Diana Marais --- Department of Plant and Soil Science, South Africa Elizabeth Ngadze --- Department of Crop Science, Zimbabwe Elsa S du Toit --- Department of Plant and Soil Science, South Africa Albert Tsindi --- Faculty of Agriculture, ZimbabweTomato is often exposed to hormones and diseases, among other factors, to which responses in leaf anatomy and yield are observed. This study evaluated responses in the leaf anatomy of Alternaria solani infected (IN) and non-infected (NIN) tomato (Solanum lycopersicum)... -
Biomarker responses in African sharptooth catfish, Clarias gariepinus (Burchell, 1822), as indicators of potential metal and organic pollution along the Vaal River system, South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LJ Connell --- , South Africa GR Jansen van Rensburg --- , South Africa A Avenant-Oldewage --- , South Africa R Greenfield --- , South AfricaThe Vaal River is of considerable economic and environmental importance. It flows through five provinces within South Africa and it is subject to numerous recreational and industrial activities, which often prove detrimental to the health of the system. To determine... -
INTRODUCTION TO THE SPECIAL ISSUE: Preliminary investigations into the COVID-19 pandemic and management in Africa
Item type: Journal Article • Journal: Africa Journal of Management • Authors: Moses Acquaah --- , USA Rebecca Namatovu --- , Denmark Moses N. Kiggundu --- , CanadaThe COVID-19 pandemic and the resulting lockdowns and restrictions taken by African governments to mitigate the spread of the virus have adversely affected the lives of people, health systems, organizations, society, and national economies. In this special issue, we take... -
Disaggregation and assessment of estuarine pressures at the country-level to better inform management and resource protection – the South African experience
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: L van Niekerk --- , South Africa S Taljaard --- , South Africa SJ Lamberth --- , South Africa JB Adams --- , South Africa SP Weerts --- , South Africa CF MacKay --- , South AfricaGlobally, the ability of estuaries to sustain functionality and productivity is deteriorating rapidly under ever-increasing anthropogenic pressures. We present a systematic approach to identify, characterise and rank global pressures affecting estuaries. Six main pressure categories are reviewed: freshwater flow modification;... -
New approaches, new activities and new outcomes in international conferences on HIV/AIDS in Africa — Report of the 3rd African Conference on the Social Aspects of HIV/AIDS, Dakar, 10 – 14 October 2005
Item type: Journal Article • Journal: SAHARA-J: Journal of Social Aspects of HIV/AIDS • Authors: C.I. Niang O. Shisana G. Andrews D. Kaseje L. Simbayi Karl Peltzer [CXX0001] Y. ToefyAfrica's HIV/AIDS situation remains cause for concern. The impact of HIV is considerable and threatens the survival and development of African societies. Although much has been attempted, the results still leave much to be desired. AIDS is an epidemic that... -
Vacillating vaccines: responses to Covid-19 in the United States and South Africa
Item type: Journal Article • Journal: Anthropology Southern Africa • Authors: Theodore Powers --- Anthropology, University of Iowa, United States of America Jimmy Pieterse --- University of Pretoria, South AfricaThis article examines the internal pathways of disease transfer within two settler colonies, the United States and South Africa, whilst also considering points of transnational connection in the social, political, epidemiological, religious and cultural responses to the Covid-19 pandemic in...
