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The effect of soil pH on potassium intensity and release of non-exchangeable potassium to ryegrass

Published online by Cambridge University Press:  27 March 2009

A. Islam  and
J. Bolton
A. Islam
Affiliation:
Rothamsted Experimental StationHarpenden, Herts
J. Bolton
Affiliation:
Rothamsted Experimental StationHarpenden, Herts
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Extract

Ryegrass was used to remove potassium from two acid soils limed to different pH values. Most non-exchangeable potassium was removed from the unlimed soils (pH 4·5) but differences in removal between pH 5·5 and 7·0 were small. Air-drying the soils after cropping released further potassium into the exchangeable form in amounts independent of soil pH.

Equilibrium potassium activity ratios (ARK) after each out declined to small constant values characteristic of the soils. A sandy soil (Woburn) initially contained less exchangeable potassium than a soil with more clay (Sawyers), but after a few crops, ARK, % K in the grass and K uptakes per cut were larger from Woburn soil, showing that non-exchangeable potassium was being released faster than in the other soil.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 75 , Issue 3 , December 1970 , pp. 571 - 576
Copyright
Copyright © Cambridge University Press 1970

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References

Addiscott, T. M. (1970). Use of the quantity/potential relationship to provide a scale of the ability of extraotants to remove soil potassium. J. agric. Sci., Camb. 74, 119–21.CrossRefGoogle Scholar
Bartlett, R. J. & McIntosh, J. L. (1969). pH-dependent bonding of potassium by a spodosol. Proc. Soil Sci. Soc. Am. 33, 535–39.CrossRefGoogle Scholar
Beckett, P. H. T. (1964). Studies on soil potassium. II. The immediate Q/I relations of labile potassium in the soil. J. Soil Sci. 15, 9–23.Google Scholar
Black, C. A. (1968). Soil-plant Relationships, 2nd ed., p. 659. New York: John Wiley and Sons.Google Scholar
Chute, J. H. & Quirk, J. P. (1967). Diffusion of potassium from mica-like clay minerals. Nature, Land. 213, 1156.CrossRefGoogle Scholar
Hossner, L. R. (1966). Release of magnesium by leaching from vermiculite, mica & prochlorite. Diss. Abstr. 26, 4140.Google Scholar
Kirsch, R. K. (1959). The importance of interaction effects in fertiliser and lime studies with strawberries. Proc. am. Soc. hort. Sci. 73, 181–88.Google Scholar
Metson, A. J. (1956). Methods of chemical analysis for soil survey samples. Bull. Soil Bur. N.Z. 12, 103.Google Scholar
Newman, A. C. D. (1969). Cation exchange properties of micas. I. The relation between mica composition and potassium exchange in solutions of different pH. J. Soil Sci. 20, 357–73.Google Scholar
Newman, A. C. D. & Brown, G. (1966). Chemical changes during the alteration of micas. Clay Miner. 6, 297–310.CrossRefGoogle Scholar
Reitemeier, R. F. (1951). Soil potassium. Adv. Agron. 3, 113–59.CrossRefGoogle Scholar
Talibudeen, O. & Dey, S. K. (1968). Potassium reserves in British soils. I. The Rothamsted Classical Experiments. J. agric. Sci., Camb. 71, 95–104.Google Scholar
Tucker, B. M. (1964). The solubility of potassium from soil illites. I. The dependence of solubility on pH. Aust. J. Soil Res. 2, 56–66.CrossRefGoogle Scholar
Williams, D. E. & Jenny, H. (1952). The replacement of non-exchangeable potassium by various acids and salts. Proc. Soil Sci. Soc. Am. 16, 216–21.CrossRefGoogle Scholar