Department of Soil Science and Agricultural Chemistry, University of Agricultural Sciences, G.K.V.K., Bangalore, Karnataka, 560065.
In Shimoga district thirtythree per cent of the total cultivated area is acidic. Total potential acidity contributed to major portion of cationic exchange capacity and it comprises pH-dependent acidity and exchange acidity. The values range from 0.3 to 12.3 and 0.6 to 11.2 cmol (p+) kg−1 in southern transitional and hilly zone. Aluminium saturation increased with increasing total potential acidity, whereas calcium saturation decreased, pH-dependent acidity contributed to more than ninety per cent of the potential acidity.
Total potential acidity, pH-dependent acidity, aluminium saturation, calcium saturation, lime requirement
