@INPROCEEDINGS {CARSKY:1999a, title = {Contribution of soil fertility research/maintenance to improved maize production and productivity in sub-Saharan Africa}, author = {Carsky, R. and Iwuafor, E. *}, editor = {Badu-Apraku, B. and Fakorede, M. and Ouedraogo, M. and Quin, F. }, booktitle = {Strategy for sustainable maize production in west and central Africa: proceedings of a regional maize workshop, Cotonou, Benin, 21-25 April 1997}, year = {1999}, pages = {3--20}, publisher = {WECAMAN; International Institute of Tropical Agriculture (IITA)}, address = {Cotonou, Benin}, }