Two of the prominent aspects of sustainability are long-term profitability and environmental protection. Limiting chemical nitrogen fertiliser use to only what is very necessary contributes to both of these aspects.
Excessive use of chemical nitrogen fertiliser has a negative effect on soil life and soil structure. Yet there still seems to be a trend of farmers wanting, or feeling the need, to apply excessive chemical nitrogen fertiliser to pastures.
Here is an example of how improved soil life and good soil structure can unlock unavailable nitrogen into a form that is readily available for pasture uptake. You can possibly reduce your nitrogen fertiliser costs.