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Effect of Exchangeable Cation and Electrolyte Concentration on Mineralogy of Clay Dispersed from Aggregates
Author(s) -
Ali O. M.,
Yousaf M.,
Rhoades J. D.
Publication year - 1987
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/sssaj1987.03615995005100040011x
Subject(s) - kaolinite , montmorillonite , vermiculite , clay minerals , electrolyte , mica , soil water , mineralogy , chemistry , adsorption , geology , soil science , paleontology , organic chemistry , electrode
Abstract The type of clay dispersed from aggregates of various arid land soils as influenced by sodium adsorption ratio (SAR) and electrolyte concentration was evaluated in Ca‐Na and Mg‐Na systems. It was observed that, in general, in the case of Fallbrook I, Fallbrook II, Pachappa, and Arlington soils, all the common clay minerals (kaolinite, clay mica, vermiculite, and montmorillonite) dispersed whenever disaggregation occurred inrrespective of SAR and electrolyte concentration levels. In Bonsall soil, kaolinite and mica clays were apparently more dispersive than montmorillonite, which, in turn, was more dispersive than mixed layer clays in Ca‐NaCl solutions. More intense x‐ray diffraction peaks were obtained, in general, in the Mg‐Na system compared to the Ca‐Na system.