what is a nitrogen gas?? what are the causes of nitrogen cycle..
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nitrogen gas is used in plants .the earth consists of 97% of nitrogen in it.
murphy1:
i asked what is nitrogen gas and its causes
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Fixation converts nitrogen in the atmosphere into forms that plants can absorb through their root systems. A small amount of nitrogen can be fixed when lightning provides the energy needed for N2 to react with oxygen, producing nitrogen oxide, NO, and nitrogen dioxide, NO2.
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