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 - jsfa. 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 - jsfa
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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