Relationship between ph measured in water and calcium chloride for soils of Southwestern Australia

Abstract

Soil pH in southwestern Australia (WA) is usually measured either in water (pH_w) or 0.01M CaCl₂ (pH_Ca). There are no published relationships to convert one pH to the other. This has been done in this paper for 236 WA soils: pH_Ca=0.918 pH_w‐0.3556, r²=0.9401. It is, therefore, concluded that, for the majority of soils within WA, it is likely that the linear model proposed for all soils would give the best relationship.