Abstract
Abstract Although the compulsive method for measuring the cation exchange properties of soils is being widely accepted particularly for highly weathered soils, part of the procedure is rather tedious involving the addition of water in a stepwise fashion to attain the specific conductance of a standard ionic strength which approximates that of many soil solutions. A modification, which estimates this quantity of water by measuring the specific conductance of the solution before addition of water, is proposed. This estimate was based on calibrations conducted on thirty‐one top‐ and sub‐soils comprising examples from six soil orders. Results obtained by both the original and modified methods were compared over 118 top‐ and sub‐soils and were highly correlated (R2= 0.99) with a slope of 1.02. The proposed modification is accurate as well as time and labor saving.
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