Forms of Sulphur in Citrus Growing Soils of Agra Region in Uttar Pradesh

The important forms of sulphur and their relationships with different soil properties were studied on soils of 20 citrus orchards of Agra region in Uttar Pradesh. All the forms of sulphur except the non-sulphate one, in general, declined with depth and had significant positive relationship with organic carbon as well as total sulphur content of the soil. Positive and significant correlation was observed between non-sulphate S and pH and sulphate S and CaCO₃ content while non-sulphate S had significantly negative relationship with clay. The correlations between forms of sulphur and other soil properties are discussed.