1. Tillage systems and soil properties in West Africa;Babalola;Soil Tillage Res.,1993
2. Bulk density;Blake,1986
3. Mechanisms of crop response to soil compaction;Boone,1994
4. Intake rate: cylinder infiltrometer;Bouwer,1986
5. Comparison de differentes techniques de travail du sol en trois ecologies de l'Afriques de l' Ouest;Chopart,1981