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Rice production by smallholder farmers in the savannas of Nigeria is constrained by weed competition. A field study was conducted to assess the effect of weed competition on the performance of upland rice varieties in 2005 and 2006 in the northern Guinea and Sudan savannas of Nigeria. The experim...


Ekeleme, F.Kamara, A.Y.Oikeh, S.O.Chikoye, D.Omoigui, L.O.[Effect of weed competition on upland rice production in north-eastern Nigeria]Effect of weed competition on upland rice production in north-eastern Nigeria

The moist savannas of West and Central Africa have great potential for maize grain production due to high levels of radiation and reduced incidence of pests and diseases. However, soils in this zone are generally low in organic matter and cation exchange capacity in addition to land use intensifi...


Ajala, S.O.Menkir, A.Kamara, A.Y.Alabi, S.O.Abdulai, M.S.[Breeding strategies to improve maize for adaptation to low soil nitrogen in West and Central Africa]Breeding strategies to improve maize for adaptation to low soil nitrogen in West and Central Africa

Striga is a major constraint to crop productivity in the savanna zones of northeast Nigeria. In a community livelihood survey, farmers in the region ranked Striga infestation as the topmost priority constraint. A field survey was, therefore, conducted to assess the level of field infestation by S...


Dugje, I.Y.Kamara, A.Y.Omoigui, L.O.[Assessment of striga infestation in crop fields in the savanna zones of northeast Nigeria]Assessment of striga infestation in crop fields in the savanna zones of northeast Nigeria

The Guinea savannas of Nigeria have a high potential for the production of maize because of favorable environmental conditions. Despite this high potential, the yields obtained under farmers' conditions are still very low. Low soil fertility and intermittent drought are among major constraints li...


Kamara, A.Y.Menkir, A.Omoigui, L.O.Kureh, I.[Potential of drought-tolerant maize varieties in nitrogen-deficient soils of the Guinea savannas]Potential of drought-tolerant maize varieties in nitrogen-deficient soils of the Guinea savannas

On-farm trials were conducted in 2001 to 2003 in the northern Guinea savanna of Nigeria to evaluate integrated Striga hermonthica control methods under farmer-managed conditions. These included intercropping a Striga-resistant maize variety with cowpea (Vigna unguiculata L.) and also cropping thi...


Kureh, IKamara, A.Y.[Effects of sole cropping, intercropping and rotation with legume trap-crops on striga control and maize grain yield in farmers' fields in the Guinea savannas]Effects of sole cropping, intercropping and rotation with legume trap-crops on striga control and maize grain yield in farmers' fields in the Guinea savannas

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

Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. A study was conducted to evaluate the response of diverse cowpea genotypes to different schedules of spraying ...


Kamara, A.Y.Chikoye, D.Omoigui, L.O.Dugje, I.Y.[Cultivar and insecticide spraying regimes effects on insect pests and grain yield of cowpea in the dry savannas of north-eastern Nigeria]Cultivar and insecticide spraying regimes effects on insect pests and grain yield of cowpea in the dry savannas of north-eastern Nigeria

A Participatory Impact assessment (PASS) was undertaken to evaluate the adoption of improved crop technologies by farmers in the savannas of Borno State, Nigeria. A total of 476 people including 288 men and 188 women participated in PASS. These included representatives of 97 farmer groups/CBOs, o...


Amaza, P.S.Ellis-Jones, J.Kamara, A.Y.Helsen, J.Gaya, H.I.[A participatory adoption of improved crop technologies in the savannas of West Africa: empirical study from Borno, Nigeria]A participatory adoption of improved crop technologies in the savannas of West Africa: empirical study from Borno, Nigeria

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