Nitrogen Fixation
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<plantfyi-glossary slug="nitrogen-fixation"></plantfyi-glossary>Definition
The biological conversion of atmospheric nitrogen gas (N2) into ammonium (NH4+), usable by plants. Carried out by free-living bacteria (Azotobacter) and symbiotic bacteria (Rhizobium in legume nodules), nitrogen fixation is essential to the global nitrogen cycle.
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