A field study was conducted in the LTFE at the Instructional Farm of the Rajasthan College of Agriculture, Udaipur. The soil of the experimental site was sandy clay loam in texture, slightly alkaline in reaction, medium in available nitrogen and phosphorus, while high in potassium and zinc. Maize variety PEHM-2 was sown at the seed rate of 25 kg ha-1 in twelve treatments. The objectives were to access status of potassium fractions in soil and their correlation under INM treatment. Application of FYM alone or in combination and 150 % NPK application related in higher value of all fraction of potassium where as availability of different fraction of potassium reduces under without potassium application. Water soluble potassium fraction was more at surface soil (0-15 cm) as compared to sub-surface soil (15-30 & 30-45 cm depth). Concentration of exchangeable potassium not showed any specific trend with depth. However, the other fractions shown decreasing trend with depth. Available potassium concentration in soil at all depths can be explained by exchangeable potassium fraction which has highly significantly co-related (r = 1.00**) with available fraction of potassium and significant co-related with water soluble K (r =0.936**) and non-exchangeable K (r = 0.936*). All six potassium fractions jointly explained 86.92 and 56.33 per cent of variation in potassium content of maize grain and stover. These relationships indicate that there existed equilibrium between these forms of K and depletion of one is instantly replenished by one or more of the other forms of K.