J. SWAMANNA, P. KAVITHA*, M. SREENIVASA CHARI AND M. SRINIVASA REDDY
Department of Soil Science and Agriculture Chemistry, Agriculture College, Mahanandi,
An investigation was carried out to study the different forms of potassium and their relationship with soil properties in rice growing soils of Kurnool district. The mean values of water soluble K, available K, exchangeable K, Non-exchangeable K and fixed K were of 20.42, 189.60, 169.18, 329.63 and 519.23 mg kg-1, respectively. Non-exchangeable K had significant positive relationship with other K fractions indicating that equilibrium exists between different forms of potassium in the soil. The order of dominance of different forms of potassium was Fixed K > Non-exchangeable K > Available K > Exchangeable K > Water soluble K. Among the different soil properties pH, CEC, organic carbon and percentage of clay showed positive correlation with all forms of potassium, indicating that soil properties are more influence on the exist of different forms of potassium.
Available K, Exchangeable K, Non-Exchangeable K, Water soluble K, Soil properties.