s:336:"%T Nitrogen and phosphorus in African soils - what role for agroforesty? 
%A Sanchez, P.A.J. 
%A Palm, C.A. 
%X The article looks at the role of agroforestry in nutrient cycling and focuses on the two main nutrients that limit production namely nitrogen and phosphorus in a small-holder production system based on maize in Africa. 
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