@PROCEEDINGS {LAL:1984d, title = {Mulch requirements for erosion control with the no-till system in the tropics: a review}, author = {Lal, R. }, booktitle = {Challenges in African Hydrology and Water resources (Proceedings of the Harare Symposium, July 1984) edited by D.E. Walling, S.S.D. Foster, P. Wurzel.}, year = {1984}, number = {144}, publisher = {International Association of Hydrological Sciences}, address = {Wallingford, Oxfordshire, England}, note = {Challenges in African Hydrology and Warer Resources (Proceedings of the Harare Symposium, July 1984). IAHS Publ. no. 144. p. 475-484}, }