Sulfate (SO 2‐ 4 ) reduction and bicarbonate (HCO ‐ 3 ) production were studied in three organic soil profiles removed intact from the California Delta area. The water table was maintained at approximately 0.75 m from the soil surface in columns 1.22 m in height. The partial pressure of carbon dioxide ( P CO 2 ) was monitored throughout the experiment. Extracted soil solutions were evaluated with respect to calcite solubility. Sulfate reduction was found to follow first‐order kinetics for three different initial SO 2‐ 4 concentrations. Bicarbonate production followed approximately the stoichiometry of the organic matter oxidation‐SO 2‐ 4 reduction reaction. Soil solutions extracted below the water table were found to be saturated with respect to calcite depending on the P CO 2 and the initial SO 2‐ 4 concentration.
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Deverel et al. (1986) studied this question.