Please make suggested changes that Cecile noted;
Just a couple of suggested changes: 
 1. In section 5.5 the commentary about the EF for dung being only 25% of that for urine is very NZ-specific and may not be so relevant for an international audience; the report quoted may also not be accessible. I suggest changing this to a more generic statement that it has been found that the EF for dung is significantly lower than that for urine. And quote research papers that are in the public domain (e.g. van der Weerden et al 2011 Agr Ecosys Env 141:426-436

 2. In section 5.6, the discussion relating to the Luo et al 2015 work on brassicas needs to includes a statement on the fact that the N content of the urines were different and that it is not clear whether difference in the N2O emissions were due to that or due to the brassica-derived compounds in the urine.