@INPROCEEDINGS {KAMARA:2001b, title = {Performance of improved maize varieties under low and high N conditions in the Guinea savannas of Nigeria}, author = {Kamara, A. and Kling, J. and Sanginga, P. and Ajala, S. }, booktitle = {Deutscher Tropentang, 9-11 Oct. Bonn, Germany}, year = {2001}, pages = {127}, }