Well because it has a fast-acting Nitrate (NO3-N) component, it works virtually immediately* on application whereas Urea, Ammonium Sulphate, and Ammo, (which is a blend of the first two) need time for its ALL ammonium (NH4-N) based Nitrogen to kick in. The cooler soil temperatures are, the slower that NH4-N will take as the bugs that break
A. The simple answer is DON’T!! Why?... All of the Nitrogen in these fertilisers is present in the slower acting Ammonium form which needs time to convert to faster-acting Nitrate N before the plant can pick it up. The bugs that convert it (Nitrification)® are very slow-acting at soil temperatures
For a start, it works in cool conditions when the alternatives languish!! In 1995 AgResearch undertook field trials for BASF who imported ASN for the first time (1994). Those trials against Urea confirmed that: ASN produced significantly more pasture dry matter than other N Forms (UREA) The positive responses were maintained through to the
