Measurement of Exchange Properties of Andisols by the Compulsive Exchange Method
- G. P. Gillman and
- M. J. Hallman
Following recent criticism that the compulsive exchange method for the determination of cation exchange capacity (CEC) and anion exchange capacity (AEC) is not appropriate for Andisols, the method has now been applied to 22 samples from eight Andisol profiles from Papua New Guinea. Results obtained for CEC and AEC compared favorably with those obtained by a Schofied-type method, and amounts of soil exchangeable cations could be explained by the CEC values measured. Specific adsorption of sulphate, if it occurs, following addition of MgSO4 in the procedure, does not affect the CEC value obtained.
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