Suggest that value could be added to the paper by acknowledging and referencing some of the vast literature on precision N-feeding and its known impacts on cattle/dairy production. Combining this with how you would actually go about this in practice through sward variation in a grazing system would be interesting. Similarly, although you make clear that this is not the scope of the paper/modelling, there would be value in adding a bit more on likely trade-offs (both on the plant and animal production side), and this would situate this work slightly more in reality.