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Fatondji, D.Martius, C.Zougmoré, Robert B.Vlek, Paul L.G.Bielders, Charles L.Koala, Saidou[Decomposition of organic amendment and nutrient release under the zai technique in the Sahel]Decomposition of organic amendment and nutrient release under the zai technique in the Sahel

Manure is a key nutrient resource on smallholder farms in the tropics, especially on poorly buffered sandy soils, due to its multiple benefits for soil fertility. Farmers preferentially apply manure to fields closest to homesteads (homefields), which are more fertile than fields further away (out...


Zingore, ShamieDelve, Robert J.Nyamangara, JusticeGiller, Ken E.[Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms]Multiple benefits of manure : The key to maintenance of soil fertility and restoration of depleted sandy soils on African smallholder farms

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
Yuhao ZhuMerbold, LutzLeitner, SonjaLonglong XiaPelster, David E.Diaz Pines, EugenioAbwanda, SheilaMutuo, Paul M.Butterbach-Bahl, Klaus[Influence of soil properties on N2O and CO2 emissions from excreta deposited on tropical pastures in Kenya]Influence of soil properties on N2O and CO2 emissions from excreta deposited on tropical pastures in Kenya

In African agriculture, availability of nutrients for crop production can be increased using external inputs such as mineral fertiliser. However, for many African farmers the large scale use of external inputs will remain beyond reach for the foreseeable future. There is, therefore, also a need f...


Brouwer, J.Powell, J.M.[Increasing nutrient use efficiency in West-African agriculture: The impact of micro-topography on nutrient leaching from cattle and sheep manure]Increasing nutrient use efficiency in West-African agriculture: The impact of micro-topography on nutrient leaching from cattle and sheep manure

Animal manure is of vital importance in maintaining soil fertility in semiarid west Africa due to the low level of use of inorganic fertilizer. Using data from Niger however, it is shown that insufficient animals are available to provide the manure needed to sustain crop yields on a long-term bas...


Williams, Timothy O.Powell, J.M.Fernández Rivera, S.[Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy?]Soil fertility maintenance and food crop production in semi-arid West Africa: Is reliance on manure a sustainable strategy?

Despite its vital role in supporting crop production, a key question that has often been posed is whether sufficient amounts of manure are available to permit adequate food production and improvement of soil quality on a long-term basis. While this question can be addressed at a regional, nationa...


Williams, Timothy O.Powell, J.M.Fernández Rivera, S.[Manure availability in relation to sustainable food crop production in semi-arid West Africa: Evidence from Niger]Manure availability in relation to sustainable food crop production in semi-arid West Africa: Evidence from Niger

Most farming systems in semi-arid West Africa rely on organic matter recycling for maintaining soil fertility. The cycling of biomass through ruminant livestock into dung (faeces) and urine that fertilize the soil has long been an important factor in the nutrient cycling processes of these integr...


Powell, J.M.Ikpe, F.N.Somda, Z.C.Fernández Rivera, S.[Urine effects on soil chemical properties and the impact of urine and dung on pearl millet yield]Urine effects on soil chemical properties and the impact of urine and dung on pearl millet yield

Velvet bean (Mucuna pruriens (L.) DC. cv.-group utilis) is widely promoted in tropical and sub-tropical regions as a green manure cover crop that can reduce weed growth and soil erosion and enhance soil fertility. To provide these benefits, the crop must attain rapid ground cover and develop subs...


Hartkamp, A.D.Hoogenboom, GerritGilbert, R.A.Benson, T.Tarawali, Shirley A.Gijsman, A.J.Bowen, W.White, Jeffrey W.[Adaptation of the CROPGRO growth model to velvet bean (Mucuna pruriens). II. Cultivar evaluation and model testing]Adaptation of the CROPGRO growth model to velvet bean (Mucuna pruriens). II. Cultivar evaluation and model testing

The role of livestock in nitrogen cycling in mixed crop-livestock farming systems of sub-Saharan Africa was explored. Cattle were fed a range of diets to investigate the effects on partitioning of nitrogen between urine and faeces and on the chemical composition of the manures produced. The trade...


Delve, Robert J.Cadisch, GeorgTanner, J.C.Thorpe, W.R.Thorne, Peter J.Giller, Ken E.[Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa]Implications of livestock feeding management on soil fertility in the smallholder farming systems of sub-Saharan Africa

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