The largest amount of nitrogen element is present in atmospheric air. The percentage of nitrogen gas is around 78%. Other gases in air includes oxygen which is around 21%, carbon dioxide and other gases contribute 1%.
Nitrogen is an essential element required for proper plant growth and development. Nitrogen is a major component of chlorophyll and it aids in the process of photosynthesis by trapping sunlight. Nitrogen is also required for the manufacture of amino acids and proteins.