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Changes in the mineralogy of a cultivated marsh soil caused by simulated weathering
Author(s) -
ARAMBARRI P.,
TALIBUDEEN O.
Publication year - 1987
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.1365-2389.1987.tb02118.x
Subject(s) - silt , weathering , cation exchange capacity , clay minerals , soil science , geology , mineralogy , fraction (chemistry) , environmental chemistry , chemistry , soil water , geochemistry , geomorphology , organic chemistry
SUMMARY Differential heats and isotherms for K‐Ca exchange and CEC values show that simulated weathering by grinding and NaTPB treatment of the coarse clay fraction of a rice‐growing marsh soil exposed vermiculitic layers to reaction with ions in solution, and also created more montmorillonitic layers and uncharged clay. Calcium selectivity was also increased, especially at K saturations > 50%. Changes in the CEC values of the fine clay, fine silt and coarse silt by such treatment, compared with that in the coarse clay fraction, were used to predict changes in the layer charges of their component phyllosilicates.