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The possible effect of soluble silicon on the lepidocrocite content of gley soils from England and Bangladesh
Author(s) -
KARIM Z.,
NEWMAN A. C. D.
Publication year - 1986
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1986.tb00027.x
Subject(s) - lepidocrocite , gleysol , soil water , dithionite , chemistry , maghemite , environmental chemistry , mineralogy , soil science , geology , hematite , goethite , biochemistry , organic chemistry , adsorption , enzyme
SUMMARY Nine different gley profiles from England and Bangladesh were studied; out of these, four English soils contained variable amounts of lepidocrocite. The amounts of lepidocrocite present in various layers of these soils decreased with increasing concentrations of Si(OH) 4 in the soil solution. The amount of lepidocrocite formed was negatively correlated ( r = ‐0.78) with the atomic ratios of Si/Fe in the citrate/dithionite extracts. Lepidocrocite was absent from the other five profiles, including three surface water gley soils from Bangladesh. These soils contained relatively large concentrations of Si(OH) 4 in soil solution, ranging between 0.7 mm and 1.0 mm. The atomic ratio of Si d /Fe d in the citrate/dithionite extracts was higher in these soils. Enborne soil contained maximum amount of citrate/dithionite extracted silicon (2.30 mg g −1 ) with no X‐ray crystalline iron oxides in the profile.