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A field study was conducted to determine the rate of genetic improvement in grain and fodder yields of cowpea genotypes developed in the Nigerian Sudan savannas from 1970 to 2004. Results showed that grain yield ranged from 568 kg/ha for an old variety TVX3236 to 1851 kg/ha for a recently release...


Kamara, A.Y.Ewansiha, S.U.Ajeigbe, Hakeem A.Okechukwu, R.U.Tefera, H.Boukar, O.Omoigui, L.O.[Improvements in grain and fodder yield of cowpea (Vigna unguiculata) varieties developed in the Sudan savannas of Nigeria over the past four decades]Improvements in grain and fodder yield of cowpea (Vigna unguiculata) varieties developed in the Sudan savannas of Nigeria over the past four decades

Striga hermonthica (L) Moench, a parasitic weed species, is a major constraint to sorghum production in the savanna zones of north-eastern Nigeria. The aim of this study was to assess the influence of farmer practices on Striga infestation of sorghum fields in the region. Random sampling techniqu...


Dugje, I.Y.Kamara, A.Y.Omoigui, L.O.[Assessment of farmers' crop management practices influencing Striga hermonthiea infestation and grain yield of sorghum (Sorghum hieolor)]Assessment of farmers' crop management practices influencing Striga hermonthiea infestation and grain yield of sorghum (Sorghum hieolor)

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

Striga gesnerioides is considered a major constraint to improving cowpea productivity in the semi arid region of Africa. A field survey was conducted in a farmer participatory process in 100 cowpea fields to determine farmers’ crop production practices that influence infestation by the parasitic ...


Dugje, I.Y.Kamara, A.Y.Ekeleme, F.[Evaluation of farmers crop production practices that determine Striga gesnerioides infestation of cowpea fields in Nigerian savannas]Evaluation of farmers crop production practices that determine Striga gesnerioides infestation of cowpea fields in Nigerian savannas

Striga hermonthica parasitism is a major constraint limiting Sorghum productivity in the Nigerian savanna. Field experiments were conducted in 2005 and 2006 rainy seasons to evaluate the response of sorghum varieties to striga infestation. A randomised complete block design was used to screen 12 ...


Dugje, I.Y.Ekeleme, F.Kamara, A.Y.Menkir, A.Chikoye, D.Omoigui, L.O.[Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas]Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas

The cultivation of soybean is increasing in the savannas of Nigeria due to its widespread use in the food and feed industry. Production is, however, constrained by low soil phosphorus (P) levels in northeast Nigeria. This study evaluated four soybean varieties for their response to three rates of...


Kamara, A.Y.Abaidoo, R.C.Kwari, J.Omoigui, L.O.[Influence of phosphorus application on growth and yield of soybean genotypes in the tropical savannas of northeast Nigeria]Influence of phosphorus application on growth and yield of soybean genotypes in the tropical savannas of northeast Nigeria

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

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
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

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