What are the sources of the atmospheric nitrogen gas ?

Nitrogen gas

Nitrogen gas  is also called the azote which means lifeless as it does not help in burning and it is not included in the respiration process , and nitrogen molecule ( N 2 ) is composed of two nitrogen atoms ( N ) .

Nitrogen gas is the most abundant gas in the atmosphere , it represents 78 % of the volume of the atmosphere , So the main source of nitrogen gas is the atmosphere air .

the plants are the main users of nitrogen gas in the soil ,They can take in the nitrates through their root system , the nitrates are used in the organic compound that let the plant survive , the organic compounds have carbon atoms which might be the proteins , the enzymes , or the  nucleic acids . 

Nitrogen gas exists in the atmosphere with a percentage of 78 % , It contributes in the composition of all living tissues of living organisms , and it is used as a biological nitrogen source by a certain bacteria .

Nitrogen cycle

Nitrogen cycle

Nitrogen gas exists in the legumes ( such as the clover , the peas and the soybeans ) that contain the protein , where their roots contain the nodular bacteria that takes the atmospheric nitrogen and converts it into the protein .

When the plants convert the nitrogen , so , nitrogen gas will be returned to the soil or the animals will get it , where the herbivores eat the plants and they convert many of the amino acids into new proteins .

The omnivores can get nitrogen gas by eating both the plants and the animals  , and the nitrogen atoms are returned to the soil in dead organisms , so the whole process can start again .

Nitrogen gas is a very important gas as it forms the protein substances that builds up the body of all the living organisms , nitrogen gas exists in all the protein substances as it is the main component of protein .

The atmospheric nitrogen is converted to nitrate which is a biologically important form by lightning as oxygen gas reacts with nitrogen gas during the lightning forming nitrogen oxide that reaches the soil during the rain .

The volatile organic nitrogen compounds are released to the atmosphere during the plant decay , and  nitrogen contributes in the composition of all the living tissues of the living organisms .

The industrial emissions and the fossil fuel combustion contribute gaseous nitrous oxides , nitrous oxides , nitrate and nitric acid which is one component of the acid rain from the sources sometimes hundreds of miles distant  .

The atmospheric nitrogen is delivered to the sea and the land in the rainfall as dissolved compounds ( the wet deposition ) and as absorbed compounds on the dust particles and the leaves ( the dry deposition ) .

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