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Effect of pH on the Cation‐Exchange Capacity of Surface Soils
Author(s) -
Pratt P. F.
Publication year - 1961
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/sssaj1961.03615995002500020008x
Subject(s) - cation exchange capacity , triethanolamine , soil water , chemistry , ion exchange , inorganic chemistry , soil ph , environmental chemistry , soil science , analytical chemistry (journal) , geology , ion , organic chemistry
A method of measuring the pH‐dependent cation‐exchange capacity of soils is described and data for 15 surface soils are presented and discussed. The pH‐dependent cation‐exchange capacity was found to be equivalent to the exchange acidity not displaced by a neutral KCl solution but displaced by buffered BaCl 2 ‐triethanolamine solution. The average contribution of the organic C and clay to the pH‐dependent cation‐exchange capacity of the soil was 370 and 15.6 me. per 100 g. of the respective materials.