NITROGEN CYCLE

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4 Terms

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1- Nitrogen fixation

Atmospheric nitrogen converted to ammonia by nitrogen fixing bacteria in soil- bacteria inhabit leguminous plant root nodules and provide ammonium ions for plant and plant provides sugars

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2- Ammonification

Saprobionts decompose organism biomass via extracellular digestion and inorganic ammonium ions are released into the soil

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3- Nitrification

Ammonium ions converted into nitrates- nitrosomonas convert ammonium ions to nitrates and nitrobacters convert nitrites to nitrates

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4- Denitrification

Denitrifying bacteria convert nitrates back into atmospheric nitrogen, taking place in anaerobic conditions