User:Rana parth

nitrogen cycle- Nitrogen is necessary for all life on Earth. Nitrogen is an important component in plant and animal cells. Organisms need nitrogen to produce proteins, nucleic acids, and amino acids. While nitrogen gas (mostly N2) makes up 78% of the Earth’s atmosphere, it is not usable in that form by most plants and animals. Most living things can only use nitrogen when combined with carbon, hydrogen, or oxygen. The nitrogen cycle describes the way in which microorganisms transform atmospheric nitrogen and the nitrogen contained in organic matter into usable compounds. The steps of the nitrogen cycle are: nitrogen fixation, assimilation, ammonification, nitrification, dentrification, and anaerobic ammonium oxidation.