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Plant relations in mixtures of Trifolium subterraneum cv. Mt Barker and Lolium multiflorum cv. Midmar: II. Yield advantage as reflected in the Land Equivalent Ratio
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M. van den Berg --- , Republic of South Africa A.J. Kruger --- , Republic of South AfricaLand Equivalent Ratios (LER) were calculated for mixtures of Trifolium subterraneum and Lolium multiflorum in terms of dry matter production and crude protein production. This ratio denotes the yield advantage, if any, of a specific mixture against the pure stands... -
Intercropping of beans (Phaseolus vulgaris L.) and sugar-cane: The effect of inter-specific competition on the growth of plant cane
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M. F.A. Leclezio --- Department of Crop Science, J.D. Lea --- Department of Crop Science, P.K. Moberly --- ,The competitive effects of intercropped beans (maturation period: three months) on the growth, tiller development and yield of plant sugar-cane (maturation period: 18 months) in the subhumid coast-hinterland of Natal were investigated over two seasons. In the first season rainfall... -
Methods of presenting intercropping results and preliminary results with Zea mays and Phaseolus vulgaris
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.N. Austin --- Department of Agronomy, J.N. Marais --- Department of Agronomy,Replacement intercropping trials with maize and dry beans were conducted to provide information which could lead to a cropping strategy that would reduce the risk of rainfed crop production in the Ciskei. Attention is focused on the problem of analysing... -
A preliminary investigation of the potential for maize - legume intercropping in the semi-arid area of Sidamo region, Ethiopia. I. Maize response
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Y.B. Alemseged --- , Australia G.W. King --- , Australia L.R. Coppock --- International Livestock Centre for Africa, Ethiopia J.C. Tothill --- International Livestock Centre for Africa, EthiopiaAn intercropping trial involving four legumes, three maize planting densities and two legume planting times was undertaken at Dembela Wacho in the Sidamo region of Ethiopia during the 1987 growing season. The objective was to explore the potential of intercropping... -
A preliminary investigation of the potential for maize - legume intercropping in semi-arid area of Sidamo region, Ethiopia. II. Legume response
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Y.B. Alemseged --- , Australia G.W. King --- , Australia L.R. Coppock --- International Livestock Centre for Africa, Ethiopia J.C. Tothill --- International Livestock Centre for Africa, EthiopiaAn intercropping trial of maize (Zea mays) with two dual-purpose and two forage legumes was undertaken at Dembela Wacho in the Sidamo region of Ethiopia during the 1987 growing season. The objective was to explore the potential of intercropping in... -
Spatial variability of nitrate nitrogen in soil during the growing season of maize, cowpea and soybean
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- Department of Agriculture, North West Province, Republic of South Africa R.O. Barnard --- Department of Plant Production and Soil Science, Republic of South AfricaThe nitrogen advantage of legumes in crop rotation systems is well known, but the nitrogen advantage from legumes to associated crops in an intercropping system is unclear. The objective of this study was to determine whether plant-available nitrogen is released... -
Grain yield response and Chilo partellus infestation in diverse sorghum-cowpea intercrop arrangements
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.K. Ayisi --- Department of Plant Production, Republic of South Africa M.S. Mposi --- Department of Plant Production, Republic of South Africa J. van den Berg --- , Republic of South AfricaYield improvement and insect pest control in intercropping systems relative to sole cultures has been variable and inconsistent over habitats, component species, varieties, density, row arrangement, soil fertility and moisture. This study was initiated to quantify yield response of two... -
Maize cropping system analysis and economic comparison for two environments
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.A. Prinsloo --- , Republic of South Africa H. J.H. Erasmus --- , Republic of South AfricaThe effect of different maize cropping systems and economic implications were investigated at two localities from 1994 to 2000. Soil types differed, and the topsoil at Bloekomspruit and Viljoenskroon contained 17% and 5% clay, respectively. The five primary cropping systems... -
Effect of tillage system and nitrogen fertilization on yield and yield components of maize in Western Ethiopia
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: D. Tolessa --- Department of Soil, Crop and Climate Sciences, South Africa C.C. Du Preez --- Department of Soil, Crop and Climate Sciences, South Africa G.M. Ceronio --- Department of Soil, Crop and Climate Sciences, South AfricaThe western part of Ethiopia has a high maize production potential as a result of favourable environmental conditions. However, maize production is constrained by non-sustainable cropping practices, particularly plough- or hoe-based cultivation, soil and water loss due to erosion, as... -
Soil organic matter and microbial biomass as influenced by sugar cane (Saccharum hybrid sp.) production practices in Mauritius
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: L.R. Ng Cheong --- , Mauritius K. F. Ng Kee Kwong --- , Mauritius C. C. Du Preez --- Department of Soil, Crop and Climate Sciences, South AfricaSugar cane has been grown in Mauritius for over 350 years in a monocropping system. As a result, soil quality could have declined since productivity has been stagnating over the last twenty years in spite of improved agronomic practices and... -
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... -
Dry matter yield and nutritional value of companion crops, intercropped with maize, for grazing purposes in northwestern KwaZulu-Natal
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: EA van Zyl CS DannhauserThe northwestern part of KwaZulu-Natal (KZN) in South Africa is suitable for sheep farming as well as crop production. However, there are some constraints to animal production due to the low quality of natural vegetation during winter. Alternative winter feeding... -
Influence of land use on phytomass accumulation in Highland Sourveld grassland in the southern Drakensberg, South Africa
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: TG O'ConnorTransformation of indigenous vegetation for production purposes impacts negatively on biodiversity but does this necessarily equate with a decrease in phytomass accumulation, which may influence carbon sequestration? Phytomass accumulation was studied for common land covers of beef ranching or dairy... -
Effect of varying degrees of plant residue cover from different crops on annual medic pasture re-establishment and production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Andries A Le Roux --- Directorate Plant Sciences, Western Cape Department of Agriculture, South Africa Johann A Strauss --- Directorate Plant Sciences, Western Cape Department of Agriculture, South Africa Petrus J Pieterse --- Department of Agronomy, South AfricaAnnual medics can play an important role as a pasture crop in short-rotation pasture-cropping systems in the Overberg district of South Africa. Permanent soil cover, an important aspect of conservation agriculture, and different crops in rotation may be, amongst other... -
Effect of conservation agriculture associated crop rotation systems on root and crown rot severity and respective soil-borne pathogens of maize (Zea mays L.) in the Highveld area of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Maryke Craven --- Agricultural Research Council – Grain Crops Institute, South Africa André A Nel --- Agricultural Research Council – Grain Crops Institute, South AfricaAlthough crop rotation reduces the incidence of soil-borne diseases, reduced tillage practices create the risk of increased disease incidence. Monoculture maize (MM) under both conventional tillage (CT) and conservation agriculture (CA) crop systems were evaluated against two-and three-year rotation CA... -
A review of conservation agriculture research in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Corrie M Swanepoel --- Agricultural Research Council–Institute for Soil, South Africa Lourens H Swanepoel --- Department of Zoology, South Africa Hendrik J Smith --- Grain SA, South AfricaConservation agriculture (CA) is advocated as a sustainable farming method to improve soil health, increase crop yields and food security, while reducing input costs. In South Africa, a country with low rainfall, limited agricultural lands and a large smallholder farming... -
Weed species composition and density under conservation agriculture with varying fertiliser rate
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Conrad Baker --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Ignacio C Madakadze --- Department of Plant Production and Soil Science, South Africa Corrie M Swanepoel --- Agricultural Research Council–Institute for Soil, Climate and Water, South Africa Zira Mavunganidze --- Department of Plant Production and Soil Science, South AfricaConservation agriculture (CA) is a sustainable management system that optimises yield while reducing input costs. However, reduction in tillage intensity and frequency as practised under CA generally alters weed densities and composition. The objective of the study was to evaluate... -
Cropping System Intensification as a Management Method Against Vectors of Viruses Causing Maize Lethal Necrosis Disease in Kenya
Item type: Journal Article • Journal: East African Agricultural and Forestry Journal • Authors: E. S. Namikoye --- Department of Agricultural Science and Technology, G. M. Kariuki --- Department of Agricultural Science and Technology, Z. M. Kinyua --- Kenya Agricultural and Livestock Research Organization, M. W. Githendu --- Department of Agricultural Science and Technology, M. Kasina --- Kenya Agricultural and Livestock Research Organization,Maize Lethal Necrosis Disease (MLND) has emerged as a great threat to maize production in East Africa. It is caused by a synergistic infection of maize by sugarcane mosaic virus (SCMV) and maize chlorotic mottle virus (MCMV). This study was... -
Improving productivity of orange-fleshed sweetpotato (Ipomoea batatas) through intercropping with legumes and moderate phosphorus application
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Eliah Munda --- International Potato Center, Mozambique Petrus J Pieterse --- Department of Agronomy, South Africa Maria I Andrade --- International Potato Center, Mozambique Godwill S Makunde --- International Potato Center, Mozambique Engil I Pereira --- School of Earth, Environmental, and Marine Sciences, USASweetpotato yield is adversely affected by poor soil fertility in Mozambique where access to inorganic fertilisers is lacking. The objective of the study was to evaluate the effectiveness of intercropping sweetpotato with groundnut and soybean at various phosphorus (P) fertilisation... -
Effect of once-off tillage on soil water, inorganic nitrogen and glomalin contents under conservation agriculture in the Swartland sub-region of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johan Labuschagne --- , South Africa Johan van Zyl --- , South Africa Gert A Agenbag --- , South Africa Izane R Crous --- , South Africa Josias E Hoffman --- , South AfricaStrategic tillage can be regarded as an important management option under conservation agriculture (CA). The effects of tillage practice and cropping sequence on volumetric water (mm mm-1), inorganic N (mg kg-1) and glomalin (mg g-1) content in the 0-300 mm... -
Forage yield, competition and economic benefit of intercropping cactus and millet with mulch in a semi-arid environment
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Marcondes de Sá Souza --- Universidade Federal Rural de Pernambuco, Brasil George do Nascimento Araújo Júnior --- Universidade Federal Rural de Pernambuco, Brasil Luciana Sandra Bastos de Souza --- Universidade Federal Rural de Pernambuco, Brasil Alexandre Maniçoba da Rosa Ferraz Jardim --- Universidade Federal Rural de Pernambuco, Brasil Gabriel Italo Novaes da Silva --- Universidade Federal Rural de Pernambuco, Brasil Gherman Garcia Leal de Araújo --- , Brasil Fleming Sena Campos --- , Brasil Maurício Luiz de Mello Vieira Leite --- Universidade Federal Rural de Pernambuco, Brasil José Nildo Tabosa --- Instituto Agronômico de Pernambuco, Brasil Thieres George Freire da Silva --- Universidade Federal Rural de Pernambuco, BrasilThis study aimed to quantify forage yield, economic performance, biological efficiency and competitive ability in cactus intercropped with millet, compared with their monocrops, both with and without mulch, under irrigation. The experiment was conducted over two years in semi-arid of... -
Lucerne establishment in dryland conditions: effects of crop residues and wheat as a nurse crop
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: Stephan le Roux --- Stellenbosch University, South Africa Pieter A Swanepoel --- Stellenbosch University, South AfricaEstablishing lucerne (Medicago sativa) in dryland conditions poses challenges due to unpredictable rainy seasons and seedling vulnerability. A potential solution is adopting a nurse crop during the first year in the same field. This study aimed to assess the impact... -
Viability of shortened canola production systems in a winter rainfall region of South Africa based on eleven years of field data
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: JA Strauss --- , South Africa L Nowers --- , South Africa M Booyse --- Agricultural Research Council, Biometry, South Africa M Van der Rijst --- Agricultural Research Council, Biometry, South AfricaCrop rotation is a key component of conservation agriculture, known to enhance yields and break the cycles of pests and diseases. In the Western Cape, South Africa, canola has become an increasingly important cash crop, with producers considering shorter rotation...