@ARTICLE {NWOKE:2008, title = {Organic acids in the rhizosphere and root characteristics of soybean (Glycine max) and cowpea (Vigna unguiculata) in relation to phosphorus uptake in poor savanna soils}, author = {Nwoke, C. and Diels, J. and Abaidoo, R. and Nziguheba, G. and Merckx, R. }, journal = {African Journal of Biotechnology}, year = {2008}, month = {October}, volume = {7}, number = {20}, pages = {3617--3624}, issn = {1684-5315}, }