@INBOOK {OPARA-NADI: 1986, title = {Effects of land clearing methods on soil physical and hydrological properties in south-western Nigeria}, author = {Opara-Nadi, A. O. and Lal, R. and Ghuman, B. S. }, year = {1986}, type = {Land Clearing and Development in the Tropics edited by R. Lal, P.A. Sanchez and R.W. Cummings, Jr. Rotterdam, A. Balkema}, pages = {215--225}, }