@ARTICLE {ASADU:1998, title = {Factors affecting the fertility status of soils growing cassava in sub-Saharan Africa}, author = {Asadu, C. * and Nweke, F. and Ekanayake, I. J. }, journal = {Communications in Soil Science and Plant Analysis}, year = {1998}, volume = {29}, pages = {141--159}, issn = {0010-3624}, note = {RTB; Root and Tuber; Cassava}, }