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Soils of many potential soybean fields in Africa are characterized by low levels of biological nitrogen fixation (BNF) activities and often cannot support high soybean yields without addition of inorganic N fertilizers or external application of soybean rhizobia. The most probable number (MPN) te...


Abaidoo, R.C.Keyser, H.Singleton, P.Dashiell, Kenton E.Sanginga, Nteranya[Population size, distribution, and symbiotic characteristics of indigenous Bradyrhizobium spp. that nodulate TGx soybean genotypes in Africa]Population size, distribution, and symbiotic characteristics of indigenous Bradyrhizobium spp. that nodulate TGx soybean genotypes in Africa
Vanlauwe, BernardSix, JohanSanginga, NteranyaAdesina, A.A.[Soil fertility decline at the base of rural poverty in sub-Saharan Africa]Soil fertility decline at the base of rural poverty in sub-Saharan Africa

Legume—maize crop rotations are used as a mechanism to reverse declining soil fertility in West Africa. However, such crop rotations exhibit a relatively low recovery of legume N. Temperate region studies partly attribute low N recovery to gaseous N losses, but this has not been established for m...


Roing, KGoossens, ADiels, J.Sanginga, NteranyaAndren, O.Vanlauwe, Bernard[Initial nitrous oxide fluxes from a maize-legume cropping system in a soil of the derived savanna zone of Nigeria-effect of fertilizer and incorporated organic matter]Initial nitrous oxide fluxes from a maize-legume cropping system in a soil of the derived savanna zone of Nigeria-effect of fertilizer and incorporated organic matter

In order to determine the improved soybean varieties that if recommended to the farmers would have a high probability of adoption, a farmer participatory approach was used to evaluate 12 soybean varieties at full podding in five locations (Oyani, Riana, Kasewe, Akiites, and Mabole) in western Ken...


Chianu, J.N.Vanlauwe, BernardMukulama, JAdesina, A.A.Sanginga, Nteranya[Farmer evaluation of improved soybean varieties being screened in five locations in Kenya : Implications for research and development]Farmer evaluation of improved soybean varieties being screened in five locations in Kenya : Implications for research and development

Two crop rotation cycles were evaluated to determine the effect of cropping systems and N fertilization on the yield and efficiency of N in maize. Maize was grown on plots which had previously supported monocrops of two genotypes each of soybean (TGx 1448-2E and SAMSOY-2) and cowpea (IT 96D-724 a...


Yusuf, A.A.Iwuafor, E.N.O.Abaidoo, R.C.Olufajo, O.O.Sanginga, Nteranya[Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria]Effect of crop rotation and nitrogen fertilization on yield and nitrogen efficiency in maize in the northern Guinea savanna of Nigeria

The fractionation of soil P into various organic and inorganic pools with differing levels of bioavailability, coupled with knowledge of the P adsorption and desorption characteristics of the soils, provides insights into management strategies that enhance P availability to crops. Sequential soil...


Nwoke, O.C.Vanlauwe, BernardDiels, J.Sanginga, NteranyaOsonubi, O.[The distribution of phosphorus fractions and desorption characteristics of some soils in the moist savanna zone of West Africa]The distribution of phosphorus fractions and desorption characteristics of some soils in the moist savanna zone of West Africa

Crop promotion is critical for market creation and rural growth in Africa. How to achieve this for crops, other than major staples (e.g., maize) and traditional export crops (e.g., tea), remains a problem since most African countries tend to focus policy attention to major staples and traditional...


Chianu, J.N.Ohiokpehai, OVanlauwe, BernardAdesina, A.A.Groot, Hugo deSanginga, Nteranya[Promoting a versatile but yet minor crop : Soybean in the farming systems of Kenya]Promoting a versatile but yet minor crop : Soybean in the farming systems of Kenya
Yusuf, A.A.Iwuafor, E.N.O.Abaidoo, R.C.Olufajo, O.O.Sanginga, Nteranya[Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria : Fixed-nitrogen versus other rotation effects]Grain legume rotation benefits to maize in the northern Guinea savanna of Nigeria : Fixed-nitrogen versus other rotation effects

Nutrient depletion is a major constraint to crop production for moist savanna soils, and inputs of nutrients are required to overcome this constraint. The impact of sole and combined applications of organic inputs (OIs) [fresh tree prunings, Pueraria phaseoloides (Roxb.) Benth. residues, and manu...


Vanlauwe, BernardAihou, K.Aman, SIwuafor, E.N.O.Tossah, B.K.Diels, J.Sanginga, NteranyaLyasse, O.Merckx, R.Deckers, J.[Maize yield as affected by organic inputs and urea in the West African moist savanna]Maize yield as affected by organic inputs and urea in the West African moist savanna

Crop response, tree biomass production and changes in soil fertility characteristics were monitored in a long-term (1986–2002) alley-cropping trial in Ibadan, Nigeria. The systems included two alley cropping systems with Leucaena leucocephala and Senna siamea on the one hand and a control (no-tre...


Vanlauwe, BernardDiels, J.Sanginga, NteranyaMerckx, R.[Long-term integrated soil fertility management in South-western Nigeria : Crop performance and impact on the soil fertility status]Long-term integrated soil fertility management in South-western Nigeria : Crop performance and impact on the soil fertility status

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