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Fig. 3. Timeline of –log of the e– activity in molar units (pe) + pH (solid line) and Fe and P concentrations during soil incubation under reduced and reoxidized conditions in the cultivated degraded peat (CDP), fallow degraded peat (FDP), nondegraded, noncalcareous peat (NDNCP), and marl soils. Time of draining and initiation of the reoxidative incubation is marked by an arrow on each x axis. To fit into the graph, the Fe concentration values were reduced by a factor of 2 for the CDP, FDP, and NDNCP soils, and by a factor of 20 for the marl soil, as shown on the y axes.
