Rational potassium manuring for arable cropping systems.

A - Papers appearing in refereed journals

Johnston, A. E. and Goulding, K. W. T. 1988. Rational potassium manuring for arable cropping systems. Journal of the Science of Food and Agriculture. 46 (1), pp. 1-11.

AuthorsJohnston, A. E. and Goulding, K. W. T.
Abstract

Interest in potassium (K) manuring has decreased in recent years because applying K leads to no environmental problems, few soils are K deficient and K is cheaper than N. However, fresh K optimises yields, especiatly with high‐yielding crops and through its interaction with N, and K residues benefit crops in a way that often cannot be offset by fresh K. To achieve a rational basis for K manuring, the various sources of K and demands for K by the crop must be considered and used, together with soil and crop analyses, to predict K fertiliser requirements. K should be applied annually, perhaps as an NK compound, on light‐textured soils. On heavier soils it can be applied at any convenient point in a rotation, probably just before the most K‐sensitive crop is grown. Applications should match or slightly exceed crop requirements. There is little to gain from omitting K and every reason, both economic and agronomic, to include it. Such a rational policy will provide due reward in current crop yields and quality and in future soil productivity.

KeywordsAgriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology
Year of Publication1988
JournalJournal of the Science of Food and Agriculture
Journal citation46 (1), pp. 1-11
Digital Object Identifier (DOI)doi:10.1002/jsfa.2740460102
Open accessPublished as non-open access
Funder project or code16
Publication process dates
Accepted1988
ISSN00225142
0022-5142
PublisherWiley
Copyright licenseCC BY

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