Spatial Variation in Physico-Chemical Properties and Nutrients Status of Paddy Growing Soils of Upper Krishna Command (UKP) Area Rajini S. R.1,*, Rao K. Narayana1, Ravi M. V.1, Vishwanath J.2, Channabasavanna B. S.3, Amaregowda A.4 1Department of Soil Science and Agricultural Chemistry, AICRP on SAS& USW, ARS, Gangavathi 2AICRP on SAS& USW, ARS, Gangavathi 3Department of Agronomy, University of Agricultural Sciences, Raichur-584 102, India 4Department of Crop-Physiology, University of Agricultural Sciences, Raichur-584 102, India *email: rajig2010@gmail.com
Online published on 13 January, 2016. Abstract A study was undertaken in UKP command area to characterize the paddy soils for various physico-chemical properties. Twenty six soil samples were collected randomly at two depths (0–15 and 15–30) from paddy growing areas andwereanalysed for various physic-chemical properties. The soils were clayey to clay loamin their texture, neutral to slightly alkaline in reaction and soluble salts were normal for growing crops. The organic carbon content was low and exhibiteddecreasing trend with the depth. Free calcium carbonate showedincreasing trend along the depth. Among exchangeable cations calcium was dominant followed by magnesium, sodium and potassium. Cat ion exchange capacity was higher at subsurface. The ESP values of soil samples was more than 15 per cent. The soils were low in nitrogen, about 63 per cent were medium in available P2O5 while 75 per cent were high in available K2O and 80 per cent of the soils were medium in sulphur. The soils were sufficient in copper and manganese and deficient in zinc and 63 per cent of samples were deficient in available iron and zinc status. Top Keywords UKP command area, Major nutrients, micronutrients, secondary nutrients, paddy soils. Top |