@ARTICLE {YUSUF:2009, title = {Rotation effects of grain legumes and fallow on maize yield, microbial biomass and chemical properties of an alfisol in the Nigerian savanna}, author = {Yusuf, A. A. and Abaidoo, R. and Iwuafor, E. * and Olufajo, O. * and Sanginga, N. }, journal = {Agriculture, Ecosystems and Environment}, year = {2009}, volume = {129}, pages = {325--331}, issn = {0167-8809}, }