Organic matter used as fertilizer in agriculture is known as Manure. Manures contribute to the fertility of the soil by adding organic matter and nutrients, such as Nitrogen that is trapped by bacteria in the soil. Higher organisms then feed on the fungi and bacteria in a chain of life that comprises the soil food web.
Manure is also being used to yield Manure energy in the form of methane, or biogas using anaerobic digestion technology.
- Gardener's Handbook