Fig. 3. The MNX, DNX, and TNX concentrations (mg L^-1) in saturated Ft. Greely surface soils. Soils were incubated at room temperature (28°C) in the dark for 5 wk. Control (Ctrl) soils were autoclaved (120°C for 20 min) three consecutive times before incubation. Acetonitrile was added to a final concentration (volume basis) of 0 µL L^-1 (0%), 1000 µL L^-1 (0.1%), and 10 000 µL L^-1 (1%).