pH / BS
Fragment of a discussion from Course talk:APBI200/Archive/2016-17WT2
re: pH in water versus pH in CaCl2
pH in water measures the pH of soil solution
pH in CaCl2 measures exchangeable acidity (thus pH in CaCl2 will be lower than pH in water). The lower the pH in CaCl2 relative to the pH in H2O, the greater the exchangeable acidity.
SandraBrown (talk)