1. Sugarcane yields as related to acidity of a humid tropical Ultisol;Abruña‐Rodriguez;Agron. J.,1967
2. Vertisols;Ahmad,1983
3. Management of Vertisols in rainfed conditions;Ahmad,1996
4. Utilization of plant‐origin waste materials for the control of plant‐parasitic nematodes;Akhtar;Bioresour. Technol.,1993
5. An assessment of some indicators and determinants of farm productivity and soil fertility in the VMC district: trends, associations, interactions 1969–1990;Alaban,1990