As with metal ores, it is useful to be able to calculate exactly what proportion the essential nutrients accounts for in a fertiliser. Ammonium nitrate (NH 4 NO 3) is commonly used as a fertiliser.

Nitrate fertilisers can be made through neutralisation reactions. To complete this, a supply of nitric acid is required. Nitric acid is then used to make ammonium nitrate which is high in nitrogen.

Dissimilatory Nitrate Reduction to Ammonium (DNRA): A microbial process ... A computational method used to predict the three-dimensional structure of a protein based on the known structures ...