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What do you mean by Nitrogen fixation?

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Fixation of atmospheric nitrogen by the microorganisms into the absorbable form, so that plants can take it up is called nitrogen fixation.
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The process of conversion of atmospheric nitrogen into a combined form such as ammonia through biological actions like Rhizobium bacteria is called nitrogen fixation.
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IT Employee, 9+ years of teaching experience

Nitrogen fixation: It is an essentially biological process and the initial stage of the nitrogen cycle. Plants cannot directly use Nitrogen gas present in the atmosphere. It needs to be fixed into the soil. It is done by certain bacterial species like Rhizobium, Azotobacter, etc. and by other natural...
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Nitrogen fixation:

  • It is an essentially biological process and the initial stage of the nitrogen cycle. 
  • Plants cannot directly use Nitrogen gas present in the atmosphere. It needs to be fixed into the soil. It is done by certain bacterial species like Rhizobium, Azotobacter, etc. and by other natural phenomena. Thus, Nitrogen in the atmosphere is converted into ammonia (another form of Nitrogen).
  • Converted Nitrogen or Ammonia will be synthesized by plants using various elements which they obtain from the atmosphere as well as from the soil.
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Highly Experienced , Certified IB ,IGCSE, IB MYP, A Level, AP Senior Chemistry ( Std 9-12) mentor

It's basically the industrial process or natural process of converting nitrogen gas of atmosphere into another form of nitrogen, e.g. ammonia. In the natural process, there are many converted by numerous microorganisms; whereas in the manmade, i.e. Industrial process which is also popularly known as...
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It's basically the industrial process or natural process of converting nitrogen gas of atmosphere into another form of nitrogen, e.g. ammonia.
In the natural process, there are many converted by numerous microorganisms; whereas in the manmade, i.e. Industrial process which is also popularly known as Haber's process, converts H2 and N2 into NH3 in the presence of a catalyst, e.g. Fe(iron).
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When atmospheric nitrogen is absorbed by the organic compounds by the chemical processes, through certain microorganisms as part of the nitrogen cycle is known as nitrogen fixation.
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Experienced and smart, qualified teacher

Plants cannot fix atmospheric nitogen directly. Therefore, it is converted into usable forms like nitrites and nitrates by the bacteria like rhizobium sp—this process is called nitrogen fixation.
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Tutor with more than 20 years teaching experience. Subjects: MATHS AND SCIENCE (CHEMISTRY FOR ICSE)

To produce proteins, leguminous plants like pea require atmospheric nitrogen. But, they cannot directly get nitrogen from the air. To overcome this problem, they undergo a symbiotic relationship in which certain rhizobium bacteria at their root nodules convert atmospheric nitrogen into soluble nitrate...
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To produce proteins, leguminous plants like pea require atmospheric nitrogen. But, they cannot directly get nitrogen from the air. To overcome this problem, they undergo a symbiotic relationship in which certain rhizobium bacteria at their root nodules convert atmospheric nitrogen into soluble nitrate salts, such that the plant could efficiently conduct it. This process is known as nitrogen fixation.

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Dental Professional with 3 years of teaching experience

Nitrogen fixation is a biological or chemical process that is carried out by some legumes like Pisum sativum, clover, soybeans, alfalfa etc. These plants need nitrogen to make proteins, nucleic acids and amino acids, which they cannot do by themselves. The chemical nitrogen fixation takes place during...
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Nitrogen fixation is a biological or chemical process that is carried out by some legumes like Pisum sativum, clover, soybeans, alfalfa etc. These plants need nitrogen to make proteins, nucleic acids and amino acids, which they cannot do by themselves. The chemical nitrogen fixation takes place during lightning that heats the air and converts atmospheric nitrogen and oxygen into oxides of nitrogen which later reacts with water and seeps into the soil, and can be used by the plants.
In biological nitrogen fixation, the legumes harbour nitrogen-fixing bacteria like Rhizobium in the nodules of their roots. These bacteria possess a symbiotic relationship with the plant and convert atmospheric nitrogen to ammonia or other nitrogen compounds, by their nitrogenase enzyme, which can be assimilated by the plants later. The fixed nitrogen is released when the plants die and make it available to other plants and fertilize the soil. Biological nitogen fixation was discovered in 1877 by Theophile Schloesing and Achille Muntz.

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Chemistry in a simple way...

Nitrogen is an essential component in DNA, RNA& protein. So nitrogen is vital for all living organisms. In our atmosphere, 78% nitrogen is available. But this molecular nitrogen is highly stable and non-reactive. So living organisms can not use this nitrogen.Some bacterias(they are present in soil...
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Nitrogen is an essential component in DNA, RNA& protein. So nitrogen is vital for all living organisms. In our atmosphere, 78% nitrogen is available. But this molecular nitrogen is highly stable and non-reactive. So living organisms can not use this nitrogen.
Some bacterias(they are present in soil & roots of the plants) are capable of converting this nitrogen into the reactive form of ammonium or nitrates. So this process of breaking nitrogen atom from nitrogen molecule and fixing with hydrogen or oxygen is called a nitrogen-fixing process.
After the nitrogen fixation, plants are getting nitrogen. We are consuming the plants and getting the nitrogen.

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Hindi and Chemistry Tutor upto 10th class

Nitrogen fixation is a process by which molecular nitrogen in the air is converted into ammonia or related nitrogenous compounds in soil.
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