As discussed above, based on the model of Harper et al. (2014), we would not expect high N2 emissions. According to Harper et al. (2014), the expected N2 would represent less than 5% of total N emissions. The absent or very small N2O
fluxes from both C and P digestates in the first weeks of storage can be explained by the absence of a crust during the storage period (Berg et al., 2006; Sommer et al., 2000). The bulk of stored liquid slurry is anaerobic and therefore emissions of N2O via nitrification and denitrification from slurry are insignificant.