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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

A field study was conducted to determine the rate of genetic improvement in grain and fodder yields and associated agronomic and physiological changes of determinate and semideterminate cowpea [Vigna unguiculata (L.) Walp.] genotypes developed in the Nigerian Sudan savannas in 1974 to 2004. Resul...


Kamara, A.Y.Tefera, H.Ewansiha, S.U.Ajeigbe, Hakeem A.Okechukwu, R.U.Boukar, O.Omoigui, L.O.[Genetic gain in yield and agronomic characteristics of cowpea cultivars developed in the Sudan savannas of Nigeria over the past three decades]Genetic gain in yield and agronomic characteristics of cowpea cultivars developed in the Sudan savannas of Nigeria over the past three decades

Field study was conducted during the rainy seasons (July-November) of 2007, 2008, 2009 and 2010 at the Research Farm of the International Institute of Tropical Agriculture (IITA) Minjibir, Kano State, Nigeria; to compare responses of six cowpea varieties to tillage. The treatments consisted of ti...


Ewansiha, S.U.Udensi, U.E.Kamara, A.[Effect of tillage on the growth and yield of cowpea varieties in Sudan savanna agroecology of Northern Nigeria]Effect of tillage on the growth and yield of cowpea varieties in Sudan savanna agroecology of Northern Nigeria

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