Relationship between different forms of soil sulphur and leaf sulphur contents and yield of groundnut

Sulphur is most impartment plant nutrient due to its involvement in the formation of chlorophyll, synthesis of proteins and sulphur containing amino acids, which are essential for oil yield and quality. Forms of soil and leaf sulphur content and pod yield of groundnut were studied in soils of Prakasam district of Andhra Pradesh. Among different forms of soil sulphur, total sulhpur ranged from 500–1000 mg kg⁻¹ and organic sulphur in the range of 459.5–946 mg kg⁻¹. The range of available + adsorbed and available sulphur, ranged from 16.5–95.6 mg kg⁻¹ and 12.5–87.5 mg kg⁻¹, respectively. Organic sulhpur constituted > 90 per cent of the total sulphur. Leaf sulphur content ranged from 0.125–0.475% and 93% samples found sufficient in leaf S, Pod yields ranged from 1400–1925 kg ha ‘ in various mandals. Simple correlations were worked out among different forms of soil sulphur, leaf sulphur and pod yield of groundnut under field conditions. A positive and significant con-elation was observed between different forms of soil soil sulphur and leaf sulphur and between leaf sulphur and pod yields of groundnut (r=0.682). The soil sulphur had positive and significant correlation with pod yield. The order of significance of different forms of soil sulphur with pod yield was available sulphur, total sulphur and organic sulphur.