@BOOK {LAL:1983, title = {No-till farming; soil and water conservation and management in the humid and subhumid tropics: IITA monograph series No. 2}, author = {Lal, R. }, series = {IITA monograph series No. 2}, year = {1983}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {64p.}, }