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The Significance of the Weathering Loss of K and MG in Soil Colloids Extracted from Illinois Soils
Author(s) -
Bray R. H.
Publication year - 1937
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1937.03615995000100000021x
Subject(s) - soil water , citation , weathering , sociology , mathematics , library science , soil science , geology , computer science , geochemistry
In the past few years considerable work has been done at the Illinois Agricultural Experiment Station analyzing fractionated colloids. Using the method described by Bray, Grim, and Kerr (4) the extracted smaller-than-1 micron clay has been fractionated into 3 fractions and each fraction has been chemically analyzed and subjected to petrographic and X-ray study. Besides soil clays the study has included various ceramic and bond clays including several fuller's earths, a metabentonite, a ball clay, various shales, a china clay, a fat clay from Germany, and some underclays. Some conclusions based on the soil clay part of this study have already been presented (1, 2). At the 1935 Chicago meeting of the American Soil Survey Association the changes in composition of the colloid with weathering were discussed (3). More recently a detailed analysis of the results has been made. This paper is concerned with the method used in this detailed analysis of the data and the probable significance of the results secured.