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The tree component of agroforestry systems may interfere with N cycling in several ways. In alley cropping systems, first of all, the prunings added during the different activities have a certain biochemical quality and subsequent N release characteristics. Secondly, the quality of the complete o...


Vanlauwe, BernardSanginga, Nteranya[Impact of the tree component on N cycling in agroforestry systems under subhumid tropical conditions]Impact of the tree component on N cycling in agroforestry systems under subhumid tropical conditions

The functioning of trees as a safety-net for capturing nutrients leached beyond the reach of crop roots was evaluated by investigating changes in exchangeable cations (Ca, Mg, and K) and pH in a wide range of medium to long term alley cropping trials in the derived savanna of West Africa, compare...


Vanlauwe, BernardAihou, K.Tossah, B.K.Diels, J.Sanginga, NteranyaMerckx, R.[Senna siamea trees recycle Ca from a Ca-rich subsoil and increase the topsoil pH in agroforestry systems in the West African derived savanna zone]Senna siamea trees recycle Ca from a Ca-rich subsoil and increase the topsoil pH in agroforestry systems in the West African derived savanna zone

While Carbon (C) sequestration on farmlands may contribute to mitigate CO2 concentrations in the atmosphere, greater agro-biodiversity may ensure longer term stability of C storage in fluctuating environments. This study was conducted in the highlands of western Kenya, a region with high potentia...


Henry, MTittonell, Pablo A.Manlay, RJBernoux, MartialAlbrecht, A.Vanlauwe, Bernard[Biodiversity, carbon stocks and sequestration potential in aboveground biomass in smallholder farming systems of western Kenya]Biodiversity, carbon stocks and sequestration potential in aboveground biomass in smallholder farming systems of western Kenya

Although the West-African moist savanna zone has a high potential for crop production, yields on farmers' fields are, on average, far below this potential, mainly due to the low use of external sources of nutrients. Since the mid-1990s, it has become clear that in order to upgrade crop production...


Vanlauwe, BernardAihou, K.Houngnandan, P.Diels, J.Sanginga, N.Merckx, R.[Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic]Nitrogen management in adequate input maizebased agriculture in the derived savanna benchmark zone of Benin Republic

The IITA in its research for sustainable soil fertility management has passed through several stages during which legume-based systems were always at the forefront. Alley cropping has N yields of more than 200 kg ha-1 with 50% N2 fixation. In the case of Mucuna cover cropping, the ecological bene...


Carsky, R.Sanginga, N.Schulz, S.Douthwaite, BoruManyong, Victor M.Diels, J.Vanlauwe, BernardKeatinge, J.D.H.[The ability to fix N is not the only key to delivery of the benefits of BNF to farmers: experience of IITA in the savannas of Africa]The ability to fix N is not the only key to delivery of the benefits of BNF to farmers: experience of IITA in the savannas of Africa

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