Fig. 3. Soil CH₄ production rates and dissolved organic carbon (DOC) concentrations in soil suspensions under different redox potential (E_H) conditions in a microcosm incubation study with six soils: (i) DOC measurement; (ii) original CH₄ flux rate; and (iii) DOC adjusted CH₄ flux rate. Only results when soil DOC measurements were conducted are included. Adjusted CH₄ flux rates were calculated by: DOC adjusted CH₄ flux rate = measured CH₄ flux rate x DOC content.