Experiment

Denitrification rate

Nitrification rate

Experiment 1

0.024 ± 0.02

−0.043 ± 0.06

Experiment 2

0.082 ± 0.01

−0.025 ± 0.01

Experiment 3

0.058 ± 0.02

−0.017 ± 0.00

Experiment 4

0.074 ± 0.02

0.14 ± 0.21