Dissolved Oxygen in Saturated Soil
1955
Scott, A. D. | Evans, D. D.
The polarographic method of measuring dissolved oxygen in saturated soil presented previously by the authors was used in the laboratory to determine what happens to dissolved oxygen in saturated soils that have no plants growing on them. Air dry soils were placed in a special glass cylinder and flooded with air saturated distilled water. The dissolved oxygen content was then recorded for an interval of time. The dissolved oxygen started to decrease immediately after the soil was flooded, and within 10 hours it had disappeared entirely. After the oxygen was depleted, more oxygen was added to the same saturated soils by flushing them with oxygen laden solutions. This added oxygen disappeared even more rapidly than it did in the freshly flooded soils. Oxidation-reduction potentials were measured in situ with bright platinum electrodes to determine the relationship between these potentials and the dissolved oxygen present. The potentials measured were not found to be a reliable index of the dissolved oxygen present.
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