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Fig. 3. Variation in redox potential (EH) over time for Plot 2R at a depth of 30 cm. Mean and range in EH is shown as determined from five electrodes at this depth. The data were used to determine the time required for the mean EH value to fall to where Fe reduction would occur following a saturation event. In this example, the soil had a high mean EH before December 25, and it required 21 d of saturation before the mean EH value fell into the level where Fe reduction was expected.
