1) Permeation 2) Pervasion 3) Suffusion 
(from the article `biosphere`) ...which they obtain by consuming plants or other animals. As these organisms die, certain microbes such as detritivores are able to participate in ... The remains of all living things—and their waste products—are decomposed by microorganisms in the process of ammonification, which yields ammonia...
[n] - impregnation with ammonia or a compound of ammonia
noun impregnation with ammonia or a compound of ammonia
the act of impregnating with ammonia, as in the manufacture of fertilizer. · the state of being so impregnated. · the formation of ammonia or its compounds by decomposition of organic matter.