Conductivity, Hydraulic

Abstract

Calcareous soils as defined here are the soils that fall between the near neutral soils and the alkaline soils (Figure C1) in redox-pH space. They straddle the calcite fence of the pedo-genic grid (Figure C2). The fence itself marks the pH zone below which calcite dissolves and above which it pre-cipitates, by the reaction CaCO 3 þ H þ ¼ Ca 2þ þ HCO À 3