In the first dataset, for each hour, the NH3 emission rate
(ER, g h1) was calculated according to Eq. (1). The average NH3
EF (kg year1 (animal place)1) was then calculated (Eq. (2)) by
taking the mean over all the (N) NH3 emission rates and converting
this mean from g h1 to kg year1 (animal place)1. In
the second dataset, the hourly NH3 emission rates and the
average NH3 EF were calculated in the same way, except that
no correction for incoming NH3 concentrations was made