KINETICS OF POTASSIUM DESORPTION FROM ENTISOL, VERTISOL AND MOLLISOL USING MISCIBLE DISPLACEMENT TECHNIQUE IN SULAMANI GOVERNORATE.

Kinetics of desorption were conducted on soil samples previously examined for adsorption characteristics from the surface horizon of seven soils of Sulaimani governorate in Kurdistan region of Iraq by using miscible displacement technique . The soil samples were leached with 0.001M CaCl2. The solution of CaCl2 was passed through the soil at flow velocities of 1ml min-1. Ten- milliliter aliquots were collected until K was not detected in the leachate.