@ARTICLE {NWOKE:2004, title = {Impact of residue characteristics on phosphorus availability in West African moist savanna soils}, author = {Nwoke, C. and Vanlauwe, B. and Diels, J. and Sanginga, P. and Osonubi, O. *}, journal = {Biology and Fertility of Soils}, year = {2004}, volume = {39}, pages = {422--428}, }