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The common nitrogen-fixer in paddy field...

The common nitrogen-fixer in paddy fields is

A

Rhizobium

B

Azospirillum

C

Oscillatoria

D

Frankia

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Verified by Experts

The correct Answer is:
B
Azospirillum is a nitrogen fixing bacterium in paddy fields. It is very useful soil and root bacterium . It is an associative symbotic `N_(2)` -fixing bacteria . When it is added to the soil, it multiples in millions and can supply 20-40 kg of nitrogen per hectare per season.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-MICROBES IN HUMAN WELFARE-EXERCISE
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  12. Which proves to be effective biological control for nematodal pathogen...

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  13. Which proves to be effective biological control for nematodal pathogen...

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  14. Which of the following statements is correct ?

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  16. A free-living nitrogen-fixing cyanobacterium which can also form symbi...

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  18. During anaerobic digestion of organic waste, such as in the producing ...

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  19. Which of the following plants are used as green manure in crop fields ...

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  20. Aquatic fern which is an excellent biofertilizer

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