Abstract
Soil samples from a long term field experiment, to study the K depletion pattern, were analysed for K. The values of supply parameters pK−1/2p (Ca+Mg) and free energy δG 0r were calculated using the data on water soluble and exchangeable cations. Correlation coefficient values between pK−1/2p (Ca+Mg) vs. total K removed, K removal by pearl millet in 1980 and soil available potassium were positive and statistically significant. This indicated that these soils have reached the stage where they would start responding to potassium application. Also, negative but significant correlation of δG 0r with pK−1/2p (Ca+Mg) and available K, were found. δG 0r values were positive indicating the affinity of such soils for K and the values, for K fertilized plots were lower in comparison to plots where no K was applied. pK−1/2p (Ca+Mg) parameter was found to be a better measure of K availability over δG 0r due to either fixation of K or greater contribution of nonexchangeable K fraction towards plant utilized K.
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References
Anonymous 1970–80 Annual reports, ‘Coordinated Project on Soil Test Crop Correlation’, Deptt. of Soils, Haryana Agricultural University, Hissar, India.
Arnold P W 1960 Potassium supplying power of some British soils. Nature London 187, 436–473.
Beckett P H T 1964 Studies on potassium, I. Confirmation of the ratio law: Measurement of potassium potential. J. Soil Sci. 15, 1–8.
Breland H L, Bertramson B R and Borland J W 1950 Potassium suplying power of several Indiana soils. Soil Sci. 70, 237–247.
DeMumbrum L E and Hoover C D 1958 Potassium release and fixation related to illite and vermiculite as single minerals and in mixtures. Soil Sci. Soc. Am. Proc. 22, 222–225.
Gaines G L and Thomas H C 1953 Adsorption studies on clay minerals. II. A formation of the thermodynamics of exchange adsorption. J. Chem. Phys. 21, 714–718.
Jackson M L, Hseung X, Corey R B, Evans E J and Van den Heuvel R C 1952 Weathering sequence of clay size minerals in soils and sediments. II. Chemical weathering of layer silicates. Soil Sci. Soc. Am. Proc. 16, 3–6.
Jackson M L 1958 Soil Chemical Analysis. Prentice Hall Inc. Englewood Cliffs, N.J.
Kanwar J S 1959 Two dominant clay minerals in Punjab soils. J. Indian Soc. Soil Sci. 7, 249–254.
Karamanos R E and Turner R C 1977 Potassium supplying power of some northern Greece soils in relation to clay mineral composition. Geoderma 17, 209–218.
McEwen H B and Matthewes B C 1958 Rate of release of non-exchangeable potassium by Ontario soils in relation to natural soil characteristics and management practices. Can. J. Soil Sci. 38, 36–42.
Schgal J L 1974 Nature and geographic distribution of clay minerals in soil of different moisture regimes in Punjab, Haryana and Himachal Pradesh. Proc. Indian Nat. Sci. Acd. 40, 151–159.
Singh B and Brar S P S 1977 Dynamics of native and applied potassium in maize-wheat rotation. Potash Rev. No. 6, 9/35, 1–6.
Wild A, Rowell D L and Dgunfowoa M A 1969 The activity ratio as a measure of the intensity factor in potassium supply to plants. Soil Sci. 108, 432–439.
Woodruff C M 1955 The energies of replacement of calcium by potassium in soils. Soil Sci. Soc. Am. Proc. 19, 167–171.
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Singh, M., Singh, A.P. & Mittal, S.B. Effect of long-term fertilization and cropping on the potassium supplying capacity of soils. Plant Soil 65, 375–382 (1982). https://doi.org/10.1007/BF02375058
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DOI: https://doi.org/10.1007/BF02375058