Different forms of sulphur in soils of Udham Singh Nagar district, Uttarakhand and their relationship with soil properties

Five hundred surface soil samples from Udham Singh Nagar district, Uttarakhand, were analyzed to assess the status of available S. The available S varied from 4.6 to 118.4 mg kg· l . The soil samples testing low, medium and high in available S were 22,31 and 47 per cent, respectively. Twenty samples each from low, medium and high S categories were analyzed for some selected soil properties and different forms of S. The contents of total, organic, potassium dihydrogen phosphate extractable, calcium chloride extractable and non-sulphate S in soils ranged from 250 to 917, 106 to 585, 10.3 to 120.5, 4.6 to 118.4 and 37.6 to 333.4 mg kg-I, respectively. Among soil properties, clay content, EC, OC, CEC and total N showed highly significant and positive correlation with all the forms of S except the non-sulphate S whereas soil pH was not related with any form of S.