@PROCEEDINGS {AIKPOKPODION:2004, title = {Proceedings of the 8th Triennial Symposium of ISTRC-AB, September 2004, IITA, Ibadan, Nigeria}, author = {Aikpokpodion, P. and Ng, N. Q. and Akoroda, M. }, year = {2004}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }