Figure 3: Mean NH2OH-to-N2O conversion ratios (RNH2OH-to-N2O) in artificial soils at different pH and MnO2 content, and for organic matter of different origins at a fixed content of 2.5% (w/w).

The total amount of NH2OH added was 5 nmol. Different symbols represent RNH2OH-to-N2O for the artificial soil mixtures with the different organic materials (n = 3, SD < 5%, not shown).