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Fig. 2. Dynamics of labeled N in NO-3 (NL) and NH+4 (AL) pools of Soil 1 after different treatments: Treatment 1, 10 mg labeled NH+4–N kg-1; Treatment 2, 10 mg labeled NH+4–N + 1000 mg C kg-1; and Treatment 3, 100 mg labeled NH+4–N + 1000 mg C kg-1. The vertical bars represent ±SD.