1. Changes in N and P availability and fractions in Iwo soil under intensive cultivation;Adepetu;Plant and Soil,1972
2. Organic manuring and green manuring in tropical agricultural production systems. Non symbiotic Nitrogen fixation and organic matter in the tropics;Agboola,1982
3. Fertility problems and its management in tropical Africa;Agboola,1982
4. Nutrient dynamics in soils of the humid tropics. In soil fertility, tilth and post clearing land degradation in t]e humid tropics;Ahmad,1985
5. Soil changes resulting from long-term management practices in Western Nigeria;Aina,1979