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The influence of an Acacia karroo tree on grass production in its vicinity
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: G.C. Stuart‐Hill --- Department of Agriculture and Water Supply (East Cape Region), N.N. Tainton --- Department of Agriculture and Water Supply (East Cape Region), H.J. Barnard --- Department of Agriculture and Water Supply (East Cape Region),The investigation was concerned with the impact of an Acacia karroo tree on the productivity of the surrounding herbaceous layer. -
Manipulasie van sori-voorkoms op Rumohra adiantiformis blare
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: ElsaS. van Wyk --- Departement Plantproduksie, Republiek van Suid-Afrika A.B. Wessels --- Departement Plantproduksie, Republiek van Suid-Afrika R. Owen --- Sentrum vir Navorsingondersteuning en Rekenaarkundigheid, Republiek van Suid-AfrikaRumohra adiantiformis (G. Forst.) Ching, die Seweweeks- of Knysnavaring se gewildheid as snyloofproduk neem vinnig toe. Onder natuurlike groeitoestande ontwikkel die Knysnavaring slegs beperkte hoeveelhede sori, terwyl groot hoeveel- hede sori ontwikkel wanneer die varing onder skadunet verbou word. Die... -
The effects of N-source, shading and root zone cooling on two Disa hybrids
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Pienaar --- Department of Agronomy, Republic of South Africa N. J.J. Combrink --- Department of Agronomy, Republic of South AfricaAlthough the Disa genus contains more than 130 species, the most commonly grown is Disa unifiora and its hybrids. The evergreen Disas are indigenous to South Africa and have great potential for marketing as cut flowers or pot plants but... -
Preliminary evaluation of soil-residual herbicides for the control of silver-leaf bitter apple (Solanum elaeagnifolium Cav.)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: B.D. Viljoen --- , 6230 Republic of South Africa C.W. Stoltsz --- , 6230 Republic of South Africa M. van der Rijst --- , Republic of South AfricaSolanum elaeagnifolium Cav., commonly known as silver-leaf bitter apple, silverleaf nightshade or “satansbos”, has become one of the most important emerging weeds in South Africa, with the potential to spread throughout some of the major crop growing areas of the... -
Modification of soil nutrients and micro‐climate by tree crowns in a semi‐arid rangeland of south‐western Zimbabwe
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: C.S. Moyo --- , Zimbabwe P.G.H. Frost --- Institute of Environmental Studies, Zimbabwe B.M. Campbell --- Institute of Environmental Studies, ZimbabweTree crowns in semi‐arid areas have often been found to create micro‐habitats of improved soil physical and nutrient status and reduced evapotranspiration. These encourage the growth of mesic, palatable and high yielding perennial grasses in otherwise arid environments. A two‐year... -
Soil characteristics under legume and non-legume tree canopies in signalgrass (Brachiaria decumbens) pastures
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Jose CB Dubeux --- North Florida Research and Education Center, USA Mario de Andrade Lira --- Instituto Agronômico de Pernambuco (IPA), Brazil Mercia V Ferreira dos Santos --- Zootecnia, Brazil Jim Muir --- Borlaug Institute, South Africa Monica A da Silva --- Zootecnia, Brazil Vicente I Teixeira --- Zootecnia, Brazil Alexandre C Leão de Mello --- Zootecnia, BrazilTree canopies can change soil environments. Our study looked at soils 10%, 50%, 100% and 150% the distance from tree trunk to canopy edge of leguminous sabiá (Mimosa caesalpiniifolia Benth.) and espinheiro (Machaerium aculeatum Raddi) and non-legume cajueiro (Anacardium occidentale... -
Water — The common element: Lessons from antiquity and the health of the environment
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: C DickensThe chief pursuit of all aquatic science is to come to know the rules that govern aquatic systems. In this pursuit many scientists move in the direction of greater diversity, where the laws that govern ecosystem relationships become increasingly confined... -
Long-term trends in the recreational shore-fishery for elf Pomatomus saltatrix (Pomatomidae) along the KwaZulu-Natal coast, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JQ Maggs --- , South Africa BQ Mann --- , South Africa RP van der Elst --- , South AfricaElf Pomatomus saltatrix account for between 28% and 80% of the annually recorded recreational shore-angling catch in KwaZulu-Natal, South Africa, and have been subjected to various management regimes over the past 33 years. Management of the elf fishery was amended... -
Low light availability affects leaf gas exchange, growth and survival of Euterpe edulis seedlings transplanted into the understory of an anthropic tropical rainforest
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: MLS dos Santos --- Departamento de Ciências Agrárias e Ambientais, Brazil S França --- Departamento de Ciências Agrárias e Ambientais, Brazil FP Gomes --- Departamento de Ciências Biológicas, Brazil JL do Nascimento --- Departamento de Ciências Agrárias e Ambientais, Brazil L dos Anjos Silva --- Departamento de Ciências Biológicas, Brazil MS Mielke --- Departamento de Ciências Biológicas, BrazilEuterpe edulis Mart. (Arecaceae) is a threatened palm tree of the Brazilian Atlantic Rainforest understory with fundamental importance for the restoration of degraded forest environments. We assessed the leaf gas exchange, growth and survival of E. edulis seedlings transplanted at... -
Effect of shading and fertilisation on the development of container-grown Nothofagus glauca seedlings, a threatened species from central Chile
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Rómulo Santelices --- Department of Forestry Science and Dryland Technology Centre, Faculty of Agrarian and Forestry Sciences, Chile Sergio Espinoza --- Department of Forestry Science and Dryland Technology Centre, Faculty of Agrarian and Forestry Sciences, Chile Antonio Cabrera Ariza --- Department of Forestry Science and Dryland Technology Centre, Faculty of Agrarian and Forestry Sciences, Chile Karen Peña-Rojas --- Department of Silviculture and Nature Conservation, Faculty of Forestry and Nature Conservation Science, Chile SergioR Donoso --- Department of Silviculture and Nature Conservation, Faculty of Forestry and Nature Conservation Science, ChileNothofagus glauca is an endemic tree of the Mediterranean zone of Chile and is a threatened species. Currently, available information for the propagation and nursery cultivation of this species is conspicuously lacking. This study examined the effect of four levels... -
Modelling growth behaviour in monoculture in subtropical eastern Australia of two eucalypt species that differ in shade tolerance
Item type: Journal Article • Journal: Southern Forests: a Journal of Forest Science • Authors: Philip W West --- Forest Research Centre, School of Environment, Science and Engineering, Australia Kevin Glencross --- Forest Research Centre, School of Environment, Science and Engineering, Australia J Doland Nichols --- Forest Research Centre, School of Environment, Science and Engineering, AustraliaGrowth behaviour of the relatively shade-intolerant species Eucalyptus dunnii and the rather more shade-tolerant Corymbia citriodora was considered during several growth periods over 8–14 years of age in experimental plantation monoculture in subtropical New South Wales. Larger trees dominated growth... -
Assessing trophic adaptability is critical for understanding the response of predatory fishes to climate change: a case study of Pomatomus saltatrix in a global hotspot
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: WM Potts --- Department of Ichthyology and Fisheries Science, South Africa RSJ Bealey --- Department of Ichthyology and Fisheries Science, South Africa A-R Childs --- Department of Ichthyology and Fisheries Science, South AfricaThere is a growing need to incorporate biotic interactions, particularly those between predators and their prey, when predicting climate-driven shifts in marine fishes. Predators dependent on a narrow range of prey species should respond rapidly to shifts in the distribution... -
An analytical-numerical approach in the calculation of photovoltaic module parameters operating under partial shaded conditions
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdouramani Dadjé --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Noël Djongyang --- Department of Renewable Energy, National Advanced School of Engineering of Maroua, Cameroon Réné Tchinda --- LISIE, Fotso Victor University Institute of Technology, CameroonThe aim of this work is to determine the parameters and characteristics of a PV module in case of partial shading conditions. Both numerical and analytical methods are used in order to attain this objective. The iterative method namely Newton-Raphson... -
Maize–Cassava Intercropping: An Effort to Increase Food and Feed Security and Incomes in Coastal Lowland Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: KK Lewa --- Kenya Agricultural and Livestock Research Organisation, Kenya WS Chivatsi --- Kenya Agricultural and Livestock Research Organisation, Kenya HM Saha --- Pwani University, Kenya RW Muinga --- Kenya Agricultural and Livestock Research Organisation, KenyaThe study was carried out at the Kenya Agricultural and Livestock Research Organisation (KALRO) Centre at Mtwapa to assess the effect of shade on the productivity of a maize–cassava intercropping system and on the contribution of the intercropping system to... -
The effect of conditioning Acacia mearnsii De Wild. hedge-plants under shadenetting on rooting, elemental uptake and productivity of cuttings
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sascha L Beck-Pay --- Institute for Commercial Forestry Research, University of KwaZulu-Natal, South Africa Mark D Laing --- Discipline of Plant Pathology, School of Agricultural Earth and Environmental Sciences, South AfricaAcacia mearnsii is a commercial forestry tree in South Africa, largely grown from open-pollinated seeds. Clonal deployment of superior selections of the species is restricted due to its poor rooting ability. The effects of conditioning parent hedge-plants under three levels... -
Efficiency and productivity analysis of pineapple farmers in the Akwapim-South District of Ghana: A distance function approach
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Yaw Ofori-Appiah --- , Ghana Edward Ebo Onumah --- , Ghana Freda Elikplim Asem --- , GhanaThe study sought to analyze the efficiency and productivity of pineapple farmers in the Akwapim-South District of Ghana. The paper employs the stochastic translog distance function technique to analyze the influence of inputs on outputs whilst highlighting the technical efficiency... -
Evaluating the effects and benefits of cover crops in citrus orchards: a review
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Sibongiseni Silwana --- ARC Infruitec-Nietvoorbij, South Africa Azwimbavhi Reckson Mulidzi --- ARC Infruitec-Nietvoorbij, South Africa Nebo Jovanovic --- University of the Western Cape, South AfricaCover crops are used in sustainable agricultural practices to improve soil quality and minimise the effect of climate change, water restrictions and drought. The South African citrus industry produces and exports a diverse range of citrus fruits; however, knowledge of... -
“We are More Than This”: Counterhistories and Female Voices in Maaza Mengiste’s The Shadow King
Item type: Journal Article • Journal: Eastern African Literary and Cultural Studies • Authors: Joseph Kwanya --- Rhodes University,In this essay, I examine the potential of the counterfactual framework in retelling obscured or misrepresented stories of women in African wartime narratives. I analyse Maaza Mengiste’s The Shadow King (2019), which uses the Second Italo-Ethiopian War as a foundation...