Fig. 1. Gross nitrification rates [avg ± standard deviation(¹⁵N) or ±error (BaPS)] determined by BaPS and the ¹⁵N dilution techniques (using the default value for the respiratory quotient, RQ_SOM, of 1.0) for soil incubated at 20°C (the error calculated by BaPS is based on error propagation instead of standard deviation, see Materials and Methods above for further explanations).