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Inoculation of cowpea and wheat with strains of Bradyrhizobium sp. that differ in their production of indole acetic acid
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: I.J. Law --- , Republic of South Africa B.W. Strijdom --- , Republic of South AfricaSufficient indole acetic acid (IAA) was produced in yeast extract-mannitol (YM) medium by each of two isolates of indigenous Bradyrhizobium sp., to inhibit primary root growth of cowpea. Similar inoculation of cowpea with YM-cultivated strains from a culture collection or... -
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 and contribution of symbiotically fixed nitrogen to seed in cowpea varieties using the 15N natural abundance technique
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: K.K. Ayisi --- Department of Plant Production, Republic of South AfricaIdentification of cowpea varieties with superior grain yield and high nitrogen fixing potential is crucial to increasing productivity of the crop among small-scale farmers in the Northern Province. A field experiment was established during the 1997/98 growing season to evaluate... -
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... -
Effect of annual legumes on soil nitrogen and on the subsequent yield of maize and grain sorghum
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Bloem --- Department of Agriculture, Conservation and Environment, Republic of South Africa R.O. Barnard --- Department of Plant Production and Soil Science, Republic of South AfricaThe objective of this study was to quantify the nitrogen and yield advantage of cowpea, soybean and groundnuts to succeeding maize and grain sorghum crops. Treatments at six localities consisted of a crop rotation with annual legumes and maize or... -
Plant water relations and proline accumulation on two cowpea (Vigna unguiculata (L.) Walp.) cultivars as a response to water stress
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: R.M. Chiulele --- Department of Agronomy, South Africa G.A. Agenbag --- Department of Agronomy, South AfricaCowpeas produced under rainfed conditions of arid and semiarid areas of Sub-Saharan Africa often experience periods of water stress. It is therefore important to identify drought tolerant cultivars of cowpeas and the mechanisms involved in their ability to withstand these... -
Grain yield and rainfall use efficiency responses of maize and alternative rotating crops under marginal production conditions in the western Highveld of South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.A. Nel --- ,Crop rotation is known to enhance crop yields. It is therefore recommended, regardless of rainfall and soil type, as a counter measure for the risks associated with monoculture maize (Zea mays). Experience in the western Highveld where rainfall is low... -
An overview of indigenous crop development by the Mpumalanga Department of Agriculture and Land Administration (DALA)
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: C. Mathews --- Department of Agriculture and Land Administration (DALA),Indigenous as well as indigenized crops form part of the daily diet of the smallholder and developing farmers in the Mpumalanga province. Developmental efforts by national research institutes on these crops under smallholder environments have been negligible in the past... -
Evaluation of four Mozambican cowpea landraces for drought tolerance
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Celia M Martins --- Forestry and Agricultural Biotechnology Institute, Plant Science Department, South Africa David W Lawlor --- Rothamsted Research, UK Orlando A Quilambo --- Department of Biological Sciences, Mozambique Karl J Kunert --- Forestry and Agricultural Biotechnology Institute, Plant Science Department, South AfricaThe southern part of Mozambique is vulnerable to drought, affecting the country's food production, and thus requires more drought-tolerant crops. Four local cowpea landraces, Massava nhassenje, Timbawene moteado, Namarua and Tete-2, which are currently widely used by local Mozambican farmers,... -
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... -
Gender-disaggregated analysis of sustainable intensification practices adoption: A case of northern Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Abdulai Adams --- SD. Dombo University of Business and Integrated Development Studies, Ghana Emmanuel Tetteh Jumpah --- Czech University of Life Sciences, Czech Republic Asaah Sumaila Mohammed --- CK. Tedam University of Technology and Applied Sciences, GhanaAgricultural productivity has remained low in Africa, especially among smallholder farmers. Women often suffer resource constraints and access to certain technologies needed to increase productivity relative to men. This study analyzes the effect of gender on the adoption of selected... -
The economics of cowpea seed contracting in Ghana
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Edward Martey --- CSIR-Savanna Agricultural Research Institute, Ghana Prince M. Etwire --- CSIR-Savanna Agricultural Research Institute, Ghana Emmanuel Y. Owusu --- CSIR-Savanna Agricultural Research Institute, Ghana Desmond S. Adogoba --- CSIR-Savanna Agricultural Research Institute, Ghana Bashiru Haruna --- CSIR-Savanna Agricultural Research Institute, Ghana Mustapha M. Suraj --- CSIR-Savanna Agricultural Research Institute, Ghana Lucky Omoigui --- International Institute of Tropical Agriculture, NigeriaThe economic impact of agricultural contracting in developing economies has been widely studied. However, limited attention has been given to the specific dynamics of seed contracting among seed producers, despite their crucial role in seed delivery systems. Price volatility remains...