The process by which decomposers break down proteins and amino acids, releasing the excess nitrogen in the form of ammonia (NH3) or ammonium ion (NH4+).

process by which bacteria convert nitrogen gas into ammonium ions (NH4) +

The biochemical process whereby ammoniacal nitrogen is released from nitrogen-containing organic compounds.

(n) impregnation with ammonia or a compound of ammonia

Generation of the ammonia form of nitrogen

This is the process in which organic forms of nitrogen (e.g., nitrogen present in dead plant material compounds) are converted to ammonium (NH4+) by decomposers (bacteria).

See mineralization.

The reduction of nitrates and nitrites to ammonium compounds by soil saprobes.

Oxidation of the organically bound nitrogen of dead biomass into ammonium (NH4+).