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Article
Estimates of Soil Solution Ionic Strength and the Determination of pH in West Australian Soils
Australian Journal of Soil Research
  • P. J. Dolling, University of Western Australia
  • G. S.P. Ritchie, University of Western Australia
Publication Date
1-1-1985
Abstract
The average ionic strength of 20 West Australian soils was found to be 0.0048. The effects of three electrolytes (deionized water, CaCl2 and KNO3), three ionic strengths (0.03, 0.005 and soil ionic strength at field capacity, Is) and two soil liquid ratios (1:5 and 1:10) on the pH of 15 soils were investigated. pH measurements in solutions of ionic strength 0.005 differed the least from measurements made at Is. The differences that occurred in comparisons with distilled water or CaCl2 of ionic strength 0.03 (0.01 M) were much greater (≥0.4 pH units). An extractant with an ionic strength of 0.005 may provide a more realistic measure of pH in the field than distilled water or 0.01 M CaCl2 for West Australian soils.
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Citation Information
P. J. Dolling and G. S.P. Ritchie. "Estimates of Soil Solution Ionic Strength and the Determination of pH in West Australian Soils" Australian Journal of Soil Research Vol. 23 Iss. 2 (1985) p. 309 - 314
Available at: http://works.bepress.com/gsritchi/4/