@INPROCEEDINGS {KOLAWOLE:2004a, title = {Balanced nutrient management system technologies in the northern Guinea savanna of Nigeria: validation, adaptation, and perspective}, author = {Kolawole, G. and Diels, J. and Manyong, V. and Wallays, K. and Dercon, G. and Iwuafor, E. * and Falaki, A and Merckx, R. and Deckers, J. }, booktitle = {International Symposium of the African Network for Soil Biology and Fertility (AFNET) of TSBF Institute of CIAT, May 2004 at Yaounde, Cameroon}, year = {2004}, }