2.Clearly understand the forms and transforms of nitrogen. Studying nitrogen's biospheric fluxes is difficult because none of them can be easily monitored, and only uptake by plants can be calculated with satisfactory accuracy.
Many microorganisms are capable of ammonification.
Most decomposers do. Denitrification only occurs under anaerobic condition. Denitrification needs reducing substrates as energy source. The enzyme system is totally inhibited by free oxygen, but not ammonia. Nitrification Nitrification is a series of oxidation processes starting from ammonium and ending with nitrate.