*Department of Agronomy, Agriculture College, Hebbal, Bangalore, Karnataka, 560024
Department of Chemistry and Soils, Agriculture College, Hebbal, Bangalore, Karnataka, 560024
Typical acid soils (Inceptiso/s) mostly from coastal areas in Karnataka were characterised for different forms of sulphur present therein. Significant relationships existed between various fractions with total sulphur. The sulphur retention capacities were high in these soils dominated by kaolinitic clay minerals associated with low pH. While the increase in seed yield of sunflower due to graded doses of sulphur application was not significant, the contents of amino acids, cystine and methionine were significantly increased with 10 and 20 ppm S levels. Sulphur application enhanced the concentration of sulphate and heat soluble forms.
Soil sulphur, forms and distribution in coastal acid soils, sulphur response of sunflower, amino acid contents
