Potassium retention and release in Rothamsted and Saxmundham soils

A - Papers appearing in refereed journals

Goulding, K. W. T. 1981. Potassium retention and release in Rothamsted and Saxmundham soils. Journal of the Science of Food and Agriculture. 32 (7), pp. 667-670.

AuthorsGoulding, K. W. T.
Abstract

The retention and release of K from ‘No K ’and K‐treated soils from the Rothamsted Classical Experiments and Saxmundham Experiment were examined using K‐Ca exchange equilibria and the kinetics of K release to Ca‐saturated resin. Free energies and enthalpies of Ca→K exchange showed that Saxmundham soils had the greater preference for K, and that residual K from long‐term manuring significantly decreased K binding strength and preference. K release kinetics showed that residual K increased the rate of K release chiefly from the ‘surface’ region, and the amount of K released from ‘surface’ and ‘peripheral’ regions of 2:1 layer silicates in soils. The increased K release from ‘peripheral’ regions of K fertilised soils, together with their decreased K preference, was associated with slowly reversible K fixation on the weathered periphery of 2:1 layer silicates.

KeywordsAgriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology
Year of Publication1981
JournalJournal of the Science of Food and Agriculture
Journal citation32 (7), pp. 667-670
Digital Object Identifier (DOI)doi:10.1002/jsfa.2740320706
Open accessPublished as non-open access
Output statusPublished
Publication dates
Print01 Jul 1981
Copyright licensePublisher copyright
PublisherWiley
ISSN0022-5142

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