Changes in macronutrient status of soils irrigated with treated sewage water and tubewell water

Surface and profile soil samples from six locations of treated sewage water (TSW) and adjoining tubewell (TW) irrigated areas were collected and analysed for organic carbon, EC, pH, available N, P, K and S and exchangeable Ca, Mg. On the basis of mean values, treated sewage irrigated soil samples showed relatively lower pH and EC but higher organic carbon, available nitrogen, phosphorus, potassium and magnesium in comparison to tubewell irrigated soils. Calcium and sulphur contents were relatively low in treated sewage water irrigated soil samples compared to tubewell irrigated soils. The nutrient index for available NPK and S for surface soil samples showed almost same trend in both command areas. Nitrogen and sulphur were low, phosphorus and potassium medium, where as organic carbon content of TSW irrigated soils was relatively more than TW irrigated soils. The fertility status of TSW irrigated soils was better than TW irrigated soils.