ammonification


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ammonification

[ə‚män·ə·fə′kā·shən]
(chemistry)
Addition of ammonia or ammonia compounds, especially to the soil.
References in periodicals archive ?
Arginine ammonification in the rhizosphere was significantly influenced by the genotypes and endophyte status (Table 1).
Arginine ammonification activity was assessed following incubation of 1.
Nitrifier populations and activities are usually limited by ammonification rates (Haynes 1986).
Nitrate ammonification can occur through 3 pathways in soil environments.
Low AP, Stark JM, Dudley LM (1997) Effects of soil osmotic potential on nitrification, ammonification, N-assimilation, and nitrous oxide production.
were derived from ammonification (Eqns 1 and 2) and nitrification (Eqn 3) reactions, as shown in the following equations:
Decarboxylation of organic anions and ammonification of plant residue-N are major causes for soil pH to increase, while nitrification of mineralised residue N causes soil pH to decrease (Pocknee and Sumner 1997; Tang and Yu 1999).
Mineralisation is considered as a 2-stage process: the first stage being a first-order ammonification process; and the second a zero-order nitrification process.
Myers RJK (1975) Temperature effects on ammonification and nitrification in a tropical soil.
In part, these patterns are hypothesised to be a consequence of discrimination against heavy isotopes during a variety of processes including (i) ammonification, (ii) nitrification, and (iii) denitrification, leaving the substrate (organic N, [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], and [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]enriched in [sup.
These net `rates' of nitrification and ammonification can be summed to provide an estimate of net mineralisation.