@ARTICLE {HULUGALLE:1990c, title = {Effect of five years of no-tillage and mulch on soil properties and tuber yield of cassava on an acid Ultisol in southeastern Nigeria}, author = {Hulugalle, N. and Lal, R. and Gichuru, M. }, journal = {Experimental Agriculture}, year = {1990}, volume = {26}, pages = {235--240}, issn = {0014-4797}, note = {RTB; Root and Tuber; Cassava}, }