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Medical Definition of AMMONIFICATION. 1. : the act or process of ammoniating. 2. : decomposition with production of ammonia or ammonium compounds especially by the action of bacteria on nitrogenous organic matter.â amÂ·moÂ·niÂ·fy \-ËfÄ«\ verb. ADVERTISEMENT.efinition of AMMONIFICATION. 1. : the act or process of ammoniating. 2.
Assimilation produces large quantities of organic nitrogen, including proteins, amino acids, and nucleic acids. Ammonification is the conversion of organic nitrogen into ammonia. The ammonia produced by this process is excreted into the environment and is then available for either nitrification or assimilation.