@ARTICLE {OGOKE:2003, title = {Effect of P fertilizer application on N balance of soybean crop in the guinea savanna of Nigena}, author = {Ogoke, I. * and Carsky, R. and Togun, A. * and Dashiell, K. }, journal = {Agriculture, Ecosystems and Environment}, year = {2003}, month = {December}, volume = {100}, number = {2-3}, pages = {153--159}, issn = {0167-8809}, }