@INPROCEEDINGS {MENKIR:2006g, title = {Progress in breeding tropical maize for adaptation to sub-optimal soil nitrogen at IITA}, author = {Menkir, A. and Ajala, S. and Kamara, A. and Meseka, S. K. *}, booktitle = {42nd Illinois Corn Breeder's School, March 6-7, 2006, Champaign, Urbana, USA}, year = {2006}, }