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The parasitic weed Striga gesnerioides (Willd) Vatke is one of the most important constraints to cowpea production in the dry savanna. Yield losses due to S. gesnerioides range from 83 to 100%. No single method however seems to be fully adequate in the control of this parasite. One practice, host...


Omoigui, L.O.Kamara, A.Y.Massawe, F.S.Ishiyaku, M.F.Boukar, O.Alabi, S.O.Ekeleme, F.[Evaluation of cowpea genotypes for their reactions to Striga gesnerioides in the dry savanna of northeast Nigeria]Evaluation of cowpea genotypes for their reactions to Striga gesnerioides in the dry savanna of northeast Nigeria

Corn (Zea mays L.) production is gradually spreading into the Sudan savanna zone of West Africa where production is limited by erratic and inadequate rainfall. To increase corn production, production practices should be properly designed to minimize the eff ects of low precipitation and high tem...


Kamara, A.Y.Ekeleme, F.Chikoye, D.Omoigui, L.O.[Planting date and cultivar effects on grain yield in dryland corn production]Planting date and cultivar effects on grain yield in dryland corn production
Dugje, I.Y.Kamara, A.Y.Kwari, J.D.[Analyses of soil physico chemical properties determining Striga hermonthica infestations and grain yield of maize (Zea mays L.) in nigerian Guinea and Sudan savannas]Analyses of soil physico chemical properties determining Striga hermonthica infestations and grain yield of maize (Zea mays L.) in nigerian Guinea and Sudan savannas

Striga gesnerioides (Willd) Vatke, is a major destructive parasitic weed of cowpea (Vigna unguiculata (L.) Walp.) which causes substantial yield reduction in West and Central Africa. The presence of different virulent races within the parasite population contributes to significant genotype × envi...


Omoigui, L.O.Kamara, A.Y.Ajeigbe, Hakeem A.Akinwale, R.O.Timko, M.P.Oyekunle, M.Bello, L.L.[Performance of cowpea varieties under Striga gesnerioides (Willd.) Vatke infestation using biplot analysis]Performance of cowpea varieties under Striga gesnerioides (Willd.) Vatke infestation using biplot analysis

Poor soil fertility, especially with low levels of nitrogen (N), is a major constraint to productivity and the production of maize in the Guinea Savanna of Nigeria. To improve efficiency of the maize to use N in the Savanna, maize genotypes with improved root systems to exploit the available N fr...


Kamara, A.Y.Menkir, A.Kureh, I.Omoigui, L.O.[Response to low soil nitrogen stress of S1 maize breeding lines selected for high vertical rootpulling resistance]Response to low soil nitrogen stress of S1 maize breeding lines selected for high vertical rootpulling resistance

On-farm trials were conducted in 2001, 2002, and 2003 in the northern Guinea savanna of Nigeria to evaluate integrated Striga hermonthica control measures under farmermanaged conditions. These included intercropping a Striga-resistant maize variety with cowpea for 3 years and also cropping this m...


Kureh, I.Kamara, A.Y.Tarfa, B.D.[Influence of cereal legume rotation on Striga control and maize grain yield in farmers fields in the northern Guinea Savanna of Nigeria]Influence of cereal legume rotation on Striga control and maize grain yield in farmers fields in the northern Guinea Savanna of Nigeria

The yield gap and variability in maize under smallholder systems in two agroecologies in northern Ghana were evaluated using a decision support system for agrotechnology transfer (DSSAT). The model was used to assess (1) the potential yield of maize (YPOT), (2) water-limited exploitable maize yie...


MacCarthy, Dilys S.Adiku, Samuel G.K.Freduah, B.S.Kamara, A.Y.Narh, S.Abdulai, A.L.[Evaluating maize yield variability and gaps in two agroecologies in northern Ghana using a crop simulation model]Evaluating maize yield variability and gaps in two agroecologies in northern Ghana using a crop simulation model

Soybean can contribute to soil N, which may partly be used to improve maize production in northeast Nigeria. However, the efficiency of soybean to fix N can be limited by soil P deficiency. This study evaluated the effect of P application and soybean cultivars on dry matter and grain yield of sub...


Kamara, A.Y.Kwari, J.Ekeleme, F.Omoigui, L.O.Abaidoo, R.C.[Effect of phosphorus application and soybean cultivar on grain and dry matter yield of subsequent maize in the tropical savannas of north eastern Nigeria]Effect of phosphorus application and soybean cultivar on grain and dry matter yield of subsequent maize in the tropical savannas of north eastern Nigeria

Cowpea is a major food and cash crop in northern Nigeria, providing nutritious grain and a less expensive source of protein for both the rural poor and urban consumers. A number of improved varieties have been developed combining diverse plant type, and different maturity periods, with resistance...


Kamara, A.Y.Omoigui, L.O.Ewansiha, S.U.[Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties]Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties

Despite the recent release of several improved varieties of groundnut in Nigeria the productivities have not increase significantly due to lack of commensurate recommendation in agronomic practices. Two groundnut varieties were evaluated for their response to different plant density and phosphoru...


Ajeigbe, Hakeem A.Kamara, A.Y.Kunihya, A.Inuwa, A.H.Adinoyi, A.[Response of groundnut to plant density and phosphorous application in the Sudan savanna zone of Nigeria]Response of groundnut to plant density and phosphorous application in the Sudan savanna zone of Nigeria

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