%0 Journal Article
%@ 1385-1314
%A Powell, J M
%A Ikpe, F N
%A Somda, Z C
%D 1999
%F icrisat:5110
%I Springer
%J Nutrient Cycling in Agroecosystems
%N 3
%P 215-226
%T Crop yield and the fate of nitrogen and phosphorus following application of plant material and feces to soil
%U http://oar.icrisat.org/5110/
%V 54
%X Organic materials are the most important sources of nutrients for agricultural production in farming systems of  semi-arid West Africa. However, reliance on locally available organic nutrient sources for both crop and livestock  production is rapidly becoming unsustainable. A series of feeding and agronomic trials have been conducted to  address the role of livestock in sustainable nutrient cycling. This paper reports results of a greenhouse study that  evaluated the effects of applying crop residue and browse leaves, or feces derived from these feeds, at equal  organic-N application rates (150 kg ha
%Z We would like to thank Salvador Fernandez-Rivera,  Pierre Hiernaux and Michael Russelle for their constructive  comments on the first draft of this pape