@INPROCEEDINGS {MANYONG:2003b, title = {Constraint and opportunities of savanna systems for improved agricultural productivity and food security in West and Central Africa}, author = {Manyong, V. and Dixon, A. }, booktitle = {Paper presented at: Paper presented at the CORAF/IAC Consultation Workshop on Science and Technology Strategies for Improving Agricultural Productivity and Food Security in West and Central Africa, 10-12 February}, year = {2003}, location = {Dakar, Senegal}, }