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Nitrogen (N) deficiency is a major constraint to the productivity of the African smallholder farming systems. Grain, green manure and forage legumes have the potential to improve the soil N fertility of smallholder farming systems through biological N2-fixation. The N2-fixation of bean (Phaseolus...


Ojiem, JOVanlauwe, BernardRidder, N.A. deGiller, Ken E.[Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms]Niche-based assessment of contributions of legumes to the nitrogen economy of Western Kenya smallholder farms

Canavalia brasiliensis (canavalia), a drought tolerant legume, was introduced into the smallholder traditional crop-livestock production system of the Nicaraguan hillsides as green manure to improve soil fertility or as forage during the dry season for improving milk production. Since nitrogen (N...


Douxchamps, SabineHumbert, FLHoek, Rein van derMena Urbina, Martin A.Bernasconi, SSchmidt, ARao, Idupulapati M.Frossard, EmmanuelOberson, Astrid[Nitrogen balances in farmers fields under alternative uses of a cover crop legume: a case study from Nicaragua]Nitrogen balances in farmers fields under alternative uses of a cover crop legume: a case study from Nicaragua

Leaves of nine green manure (GM) species were surface applied to a tropical volcanic-ash soil at a rate of 100 kg N ha 1 in order to evaluate their N-fertilizer value in a glasshouse experiment. GM treatments were compared to urea at two rates, 50 kg N ha 1 (FN50) and 100 kg N ha 1 (FN100), and t...


Cobo Borrero, Juan G.Barrios, E.Kass, DCLThomas, Richard J.[Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil]Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil

Howeler, Reinhardt H.Thai Phien[Integrated nutrient management for more sustainable cassava production in Vietnam]Integrated nutrient management for more sustainable cassava production in Vietnam

Wortmann, Charles S.Fischler, MAAlifugani, FKaizzi, CK[Accomplishments of participatory research for systems improvement in Iganga District, Uganda 1993 to 1997]Accomplishments of participatory research for systems improvement in Iganga District, Uganda 1993 to 1997

Buruchara, Robin A.Scheidegger, Urs C.[Development of cultural components in integrated management of root rots of beans]Development of cultural components in integrated management of root rots of beans
International Center for Tropical Agriculture[Soil conservation and fertility maintenance research in Asia]Soil conservation and fertility maintenance research in Asia

This paper reports on a Participatory Learning and Action Research (PLAR) process that was initiated in three villages in eastern Uganda in September 1999 to enable small-scale farmers to reverse nutrient depletion of their soils profitably by increasing their capacity to develop, adapt and use i...


Esilaba, Anthony O.Byalebeka, J.B.Delve, Robert J.Okalebo, JRSsenyange, DMbalule, MSsali, H.[On farm testing of integrated nutrient management strategies in Eastern Uganda]On farm testing of integrated nutrient management strategies in Eastern Uganda

Amede, TilahunKirkby, Roger A.[Guidelines for integration of legumes into the farming systems of East African highlands]Guidelines for integration of legumes into the farming systems of East African highlands

International Center for Tropical Agriculture[Biophysical and socioeconomic processes understood, principles and concepts developed for protecting and improving the health and fertility of soils: Output 1]Biophysical and socioeconomic processes understood, principles and concepts developed for protecting and improving the health and fertility of soils: Output 1

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