@ARTICLE {SANGINGA:1996d, title = {Phosphorus requirement and nodulation of herbaceous and shrub legumes in low P soils of a Guinean Savanna in Nigeria}, author = {Sanginga, N. and Okogun, J. and Akobundu, I. and Kang, B. }, journal = {Applied Soil Ecology}, year = {1996}, volume = {3}, number = {3}, pages = {247--255}, issn = {0929-1393}, }