The representative soil series of order Entisols, Inceptisols and Vertisols collected from agriculture college Kolhapur and different research stations of Sub-montane zone of Maharashtra were assessed for potassium release and fixation capacity. The K-fixation in different soils ranged from 78.80 mg kg-1 (Kurkum series of A.R.S., Vadgaon-Maval) to 276.40 mg kg-1 (Koregaon series of A.R.S., Karad). From the mean values, it was observed that Vertisols showed highest K fixation capacity followed by Inceptisols and Entisols. All the soil series were categorized as very low in step K except Koregaon series of A.R.S., Karad of Vertisols. The sub-surface horizon showed higher cumulative step K release than the surface horizon. The step K and constant rate K was highest in Vertisols followed by Inceptisols and Entisols.
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- Haylock, O.F. (1956) A method for estimating the availability of non-exchangeable potassium. Transactions 6th International Congress of Soil Science. 8: 402-408.
- Mengel, K. and Kirkby E.S. (1987) Principles of plant nutrition. International Potash Institute, Switzerland. pp. 655.
- Srinivasa Rao, Ch., Gupta, T.R., Subba Rao, A. and Bansal, S.K (2000) Potasium fixation characteristics of major benchmark soils of India J. Indian Soc. Soil Sci., 48(2): 220- 228.
- Subha Rao, Sesha, M.V.R. and Pal, S.K. (1993) Non -exchangeable potassium reserve and their categorization in some soils of India J. Indian Soc. Soil Sci., 41(4): 667-673.