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. 2020 Mar 13;8(3):404. doi: 10.3390/microorganisms8030404

Figure 4.

Figure 4

Potential ammonia oxidation rates (pmol g−1 d−1) using labelled 15NH4+ to a final concentration of 4 µM in Miers (A) and Beacon Valleys soils (B) for the following treatments: ammonium augmentation (NH4+), Cu and glucose amendments, and conductivity treatment. Error bars indicate the standard variation in the rates measured of two replicates.