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The largest resevoir of nitrogen on eart...

The largest resevoir of nitrogen on earth is

A

soil natrure (pH)

B

air

C

ocean

D

rocks

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Verified by Experts

The correct Answer is:
B
Nitrogen is the fourth most prevalent element in living systems. It is available in the atmosphere in abundance (78% of atmosphere as dinitrogen of `N_(2)`) but plants cannot directly absorb the same. Nitrogen compounds are obtained from reservoir pool through nitrogen fixation.
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NCERT FINGERTIPS-MINERAL NUTRITION-Mineral Nutrition
  1. The limiting factor in nitrogen fixation of soil is

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  2. All N(2) fixers belong to

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  3. The largest resevoir of nitrogen on earth is

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  4. if by radiation all nitrogenase enzyme is inactivated, then there will...

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  5. A farmer adds Azotobacter culture to soil before sowing maize. Which m...

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  6. is a free-living N(2)-fixing aerobic bacterium.

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  7. Which of the following is a non-symbiotic nitrogen fixing prokaryote?

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  8. Which of the following is a free-living nitrogen fixing cyanobacteria?

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  9. Symbiotic bacteria are found in the root nodules of members family

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  10. The bacteriumbelonging to group actinomycetes, produces N(2)-fixing no...

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  11. Select the mismatched pair.

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  12. Certain non-leguminous plants also form nodules to fix N(2). Example o...

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  13. N(2)-fixing blue-green alga Anabaena which is extensively used in rice...

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  14. The nodules present in the leguminous plants appear pink in colour due...

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  15. During nodule formation in leguminous plants, an infection thread is p...

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  16. Refer to the given figure and select the correct option.

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  17. Study the given figures carefully showing the development of root nodu...

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  18. What dows the given figure represent?

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  19. During N(2) fixation, reduction of one molecule of nitrogen into 2 mol...

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  20. Which one is the correct equation of nitrogen fixation?

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