@INPROCEEDINGS {KANG: 1985, title = {Nitrogen management in alley cropping systems}, author = {Kang, B. and Duguma, B. }, booktitle = {Nitrogen management in farming systems in humid and subhumid tropics}, year = {1985}, pages = {269--277}, note = {Proceedings of Symposium on Nitrogen Management in Farming systems in humid and sub humid Tropics held at the International Institute of Tropical Agriculture (IITA), Ibadan, October23-26,1984 edited by B.T. Kang and Van der Heide}, }