1. ACIAR 1984. Australian Centre for International Agricultural Research. Proc. Int. Workshop on Soils, Townsville, Old., Australia, Sept. 12–16, 1983.
2. Agboola, A. A. 1981. The effects of different soil tillage and management practices on the physical and chemical properties of soil and maize yield in a rain forest zone of Western Nigeria. Agron. J. 73: 247–251.
3. Aina, P.O. 1979. Soil changes resulting form long term management practices in Western Nigeria. Soil Sci. Soc. Am. J. 43: 173–177.
4. Aina, P.O., R Lal, and G.S. Taylor. 1977. Soil and crop management in relation to soil erosion in the rain forest of Western Nigeria. In G. R Foster (ed.) Soil Erosion Prediction and Control. Soil Conserv. Soc. Am. Spec. Publ. Ankeny, Iowa. 21; 75–82.
5. Ajunwon, S.O., B.A. Olunuga, and R Lal. 1978. Applicability of no-tillage techniques in the forest and savannah regions of Western Nigeria. Nigerian J. Sci. 12: 247–286.