The nitrogen cycle is a biogeographic cycle which details the circulation of nitrogen through the biosphere. Within this are four major processes. One is fixation. Fixation is the conversion of nitrogen into ammonia by prokaryotes. This is meaningful because nitrogen is unusable by life, but ammonia is not. Another process is mineralization, which is the release of nitrogen during decomposition. Nitrification is the oxidation of ammonia and then nitrates. Last is denitrification, the process of reducing nitrate into nitrogen by bacteria.
60°21'4.59"N
87° 1'56.98"E
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