Mixing this biomass with a synthetic fertilizer will bring higher yields.

The resultant nitric acid was then used for the production of synthetic fertilizer.

For every pound of cotton harvested, a farmer uses up 1/3 lb of chemical, synthetic fertilizer.

The use of synthetic fertilizers accounts for more than half that growth.

For example, human activities have more than doubled the amount of nitrogen globally from 1960 to 1990, with the use of synthetic fertilizers accounting for the majority of that growth.