The largest reservoir of nitrogen on Earth is the atmosphere.
It is about 78% in the atmosphere.
What is nitrogen?
Nitrogen is an element with atomic number of 7 that is about 78% in the atmosphere and it is found in root nodules of leguminous plants. It is very important for growth and reproduction in plants and also animals. It is the major constituents of amino acids, proteins, nuclei acids.
Therefore, The largest reservoir of nitrogen on Earth is the atmosphere.
It is about 78% in the atmosphere.
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