Potassium is essential for various metabolic activities of living cell, transformation of carbohydrates, reduction of nitrates, synthesis of protein and normal meristematic activities where it acts as a catalyst or as a co- factor in enzymatic reaction of living cells. In the present study, the various soil samples were studied. The amount of water soluble, exchangeable, available, non-exchangeable, lattice and total-K in soil samples; ranged from 0.008 - 0.051, 0.251 - 0.975, 0.266 - 1.012, 0.625 - 2.987, 21.818 - 45.883 and 23.515 - 49.640 me/100g with the mean value of 0.019, 0.550, 0.569, 1.463, 32.522 and 34.574 me/100g respectively. Results of the study indicated that all the forms of potassium found higher in black soils compared to red soils. The water soluble and exchangeable K was higher in surface sample compared to sub surface in both the soil type. Whereas, non-exchangeable, lattice and total K was higher in sub surface than the surface in both the soil types.