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Field trials were conducted in 2005 and 2006 in Tilla (northern Guinea savanna) and Sabon-Gari (Sudan savanna) in northeast Nigeria to determine the performance of two improved cowpea varieties when relay-intercropped with early and late maize, 6 and 8 weeks after planting the maize. Grain yield,...


Kamara, A.Y.Omoigui, L.O.Ewansiha, S.U.Ekeleme, F.Chikoye, D.Ajeigbe, Hakeem A.[Performance of semideterminate and indeterminate cowpeas relaycropped into maize in Northeast Nigeria]Performance of semideterminate and indeterminate cowpeas relaycropped into maize in Northeast Nigeria

Soils of the moist savanna of West Africa are poor in nitrogen; the natural fallow regeneration time has shortened; fertilizer costs and scarcity makes nitrogen (N) fertilizer input inadequate; and crop yields are low. In the region, lablab (Lablab purpureus L., sweet also known as Dolichos labla...


Ewansiha, S.U.Tarawali, Shirley A.Odunze, A.Iwuafor, E.[Potential contribution of lablab residues to maize production in moist savanna of West Africa]Potential contribution of lablab residues to maize production in moist savanna of West Africa

The Nigerian savanna zone is currently witnessing increasing intensities of crop and livestock production activities that are resulting in increased soil erosion, de-vegetation of the land area, and desert encroachment especially during the dry season. These may have led to the presence of severa...


Odunze, A.C.Tarawali, S.A.Haan, N.C. deIwuafor, E.N.O.Katung, P.D.Akoueguon, G.E.Amadji, A.F.Schultze-Kraft, RainerAtala, T.K.Ahmed, B.Adamu, A.Babalola, A.O.Ogunwole, J.O.Alimi, A.Ewansiha, S.U.Adediran, S.A.[Grain Legumes for soil productivity improvement in the Northern Guinea savanna of Nigeria]Grain Legumes for soil productivity improvement in the Northern Guinea savanna of Nigeria

A field trial was conducted during the rainy seasons of 2008 and 2009 at Samaru in northern Guinea savannah of Nigeria to determine the performance of semi-determinate and indeterminate cowpea cultivars intercropped with extra early, early and late maize cultivars. The trial was laid out in a ran...


Ewansiha, S.U.Kamara, A.Onyibe, J.E.[Performance of cowpea cultivars when grown as an intercrop with maize of contrasting maturities]Performance of cowpea cultivars when grown as an intercrop with maize of contrasting maturities

Maize (Zea mays L.) is an important food crop in the Guinea savannas of Nigeria. Despite its high production potential, drought, Striga hermonthica parasitsim, and poor soil fertility particularly nitrogen deficiency limit maize production in the savannas. Breeders at IITA have developed drought-...


Kamara, A.Ewansiha, S.U.Menkir, A.[Assessment of nitrogen uptake and utilization in drought tolerant and Striga resistant tropical maize varieties]Assessment of nitrogen uptake and utilization in drought tolerant and Striga resistant tropical maize varieties

Cowpea-maize intercropping causes low yields of cowpea due to shading effect by maize plants. Staggering of dates of planting of cowpea in an intercrop is a potential way of reducing intercrop shading while increasing cowpea yield. Nonetheless, contrasting cowpea cultivars may have differential r...


Ewansiha, S.U.Kamara, A.Chiezey, U.F.Onyibe, J.E.[Agronomic responses of diverse cowpea cultivars to planting date and cropping system]Agronomic responses of diverse cowpea cultivars to planting date and cropping system

The goal of this research was to evaluate diverse cowpea genotypes developed over the past 4 decades in the Nigerian Sudan Savannas for their agronomic performance and to identify groups of cultivars with similar quantitative characters. Characterization would facilitate the efficient synthesis o...


Kamara, A.Y.Ewansiha, S.U.Ajeigbe, Hakeem A.Omoigui, L.O.Tofa, A.I.Karim, K.Y.[Agronomic evaluation of cowpea cultivars developed for the West African Savannas]Agronomic evaluation of cowpea cultivars developed for the West African Savannas

Soils of the moist savanna of West Africa are poor in nitrogen; the natural fallow regeneration time has shortened; fertilizer costs and scarcity makes nitrogen (N) fertilizer input inadequate; and crop yields are low. In the region, lablab (Lablab purpureus L., sweet also known as Dolichos labla...


Ewansiha, S.U.Tarawali, Shirley A.Odunze, A.C.Iwuafor, E.N.O.[Potential contribution of Lablab residues to maize production in moist savanna of West Africa]Potential contribution of Lablab residues to maize production in moist savanna of West Africa

The introduction and use of herbaceous legumes may contribute to agricultural intensification, especially in the context of sustainable crop and livestock production systems. In the context of evaluating different legume species for these systems in moist savanna zone of West Africa, the present ...


Ewansiha, S.U.Chiezey, U.F.Tarawali, Shirley A.Iwuafor, E.N.O.[Potential of Lablab purpureus accessions for crop-livestock production in the West African savanna]Potential of Lablab purpureus accessions for crop-livestock production in the West African savanna

populations were the main plots, whereas varieties were subplots. The proportion of intercepted photosynthetically active radiation (IPAR) and leaf area index (LAI) increased with increasing plant population at both locations, indicating that high leaf area indices and high degree of canopy closu...


Kamara, A.Ewansiha, S.U.Boahen, S.Tofa, A.I.[Agronomic Response of Soybean Varieties to Plant Population in the Guinea Savannas of Nigeria]Agronomic Response of Soybean Varieties to Plant Population in the Guinea Savannas of Nigeria

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