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Non biological nitrogen fixation is also known as electro chemical or photochemical nitrogen fixation. The conversion of atmospheric nitrogen into NO2, NO3, NH3 with help of lightning and radiation. These lightning and radiations splits the molecular nitrogen into nitrogen atom. It then combines with hydrogen or oxygen of atmospheric water forming the ammonia or nitric oxides or nitrous oxides. These oxides then get hydrated and form nitrous and nitric acid, these acids and ammonia is washed of along with rain into the soil. There these acids combine with metallic ions to form metallic nitrites or nitrates.

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