Definitions for "Base saturation"
the portion (percentage) of the cation exchange capacity of a soil that is occupied by basic cations; the remainder is occupied by acidic cations, and is referred to as the "base unsaturation."
The degree to which material having cation-exchange properties is saturated with exchangeable bases (sum of Ca, Mg, Na, K), expressed as a percentage of the total cation-exchange capacity.
The proportion of the base exchange capacity that is saturated with metallic cations.