Changes with time in the potassium content and phyllosilicates in the soil of the Broadbalk continuous wheat experiment at Rothamsted

A - Papers appearing in refereed journals

Singh, B. and Goulding, K. W. T. 1997. Changes with time in the potassium content and phyllosilicates in the soil of the Broadbalk continuous wheat experiment at Rothamsted. European Journal of Soil Science. 48 (4), pp. 651-659.

AuthorsSingh, B. and Goulding, K. W. T.
Abstract

The transformations of phyllosilicates and the changes in potassium (K) balances caused by long-term cropping have been examined in soil from the 153-year-old Broadbalk experiment. Samples taken between 1856 and 1987 and kept in archive were fractionated for particle size and analysed for changes in mineralogy by X-ray diffraction and changes in total K of the coarser and fine fractions. These were compared with K balances made from records of cropping and fertilizer application. No change in mica due to cropping and K-depletion could be detected. Deep ploughing after 1925 mixed chlorite from the subsoil into the surface soil, but this had weathered by 1987. Potassium balances did not agree with measured changes in total K presumably because of unquantified uptake of K from the subsoil and poorly quantified K leaching.

KeywordsSoil Science
Year of Publication1997
JournalEuropean Journal of Soil Science
Journal citation48 (4), pp. 651-659
Digital Object Identifier (DOI)doi:10.1046/j.1365-2389.1997.00115.x
Open accessPublished as non-open access
Funder project or code219
443
ISSN13510754
1351-0754
PublisherWiley

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