Step in the nitrogen cycle to its description -
- bacteria convert atmospheric nitrogen to ammonia - nitrogen fixation
- bacteria convert nitrates into nitrogen gas - denitrification
- bacteria convert ammonia to nitrites and nitrates - nitrification
- bacteria break down waste products and return nitrogen to the soil - ammonification
- plants and animals take in and use nitrogen compounds - assimilation
The nitrogen cycle is a biogeochemical cycle in which nitrogen is circulated, converted into different chemical forms, in ecosystems including the biosphere and the atmosphere. It has various steps:
- Nitrogen Fixation is the first step in the nitrogen cycle in which the conversion of atmospheric nitrogen into ammonia with the help of bacteria such as Azotobacter and Rhizobium.
- Assimilation - involves the absorption of nitrogen compounds by the plants from the soil.
- Ammonification - in this step dead organic matter of plants and animals are decomposed by the soil bacteria to produce ammonia.
- Nitrification - Involves conversion of ammonia into nitrates by the soil bacteria Nitrosomonas and Nitrococcus.
- Denitrification: a microbial process of reducing nitrate and nitrite to gaseous forms of nitrogen
Thus,
Step in the nitrogen cycle to its description -
- bacteria convert atmospheric nitrogen to ammonia - nitrogen fixation
- bacteria convert nitrates into nitrogen gas - denitrification
- bacteria convert ammonia to nitrites and nitrates - nitrification
- bacteria break down waste products and return nitrogen to the soil - ammonification
- plants and animals take in and use nitrogen compounds - assimilation
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