The common nitrogen-fixer in paddy fields is_______.
  • a)
    Oscillatoria
  • b)
    Frankia
  • c)
    Rhizobium
  • d)
    Azospirillum
Correct answer is option 'D'. Can you explain this answer?

NEET Question

By Dihsin. Rakkaht · Sep 04, 2018 ·NEET
63 Answers
Pooja Tamil answered Dec 09, 2018

Himanshuraj Saini answered Apr 05, 2020

Saurabh Shanky answered Dec 09, 2018
In ncert it is written that cynobacterias are the most common biofertilisers in paddy field with eg anabaena, oscillatoria and nostoc. Answer must be a)

Kanika S answered Apr 08, 2020
Rhizobium fixes nitrogen in legumes

Shruti Tapare answered 4 weeks ago
D option is correct

Hilda Darling answered 3 weeks ago
Anabena and azosprillum are correct

Awantika Gupta answered Apr 15, 2020
Correct option is Oscillatoria. Refer ncert class 12 page no. 188

Minnet Sailusha answered 3 weeks ago
Is option A wrong??

Maitrayee Rajbongshi answered Mar 14, 2020
Azospirillum is the correct answer it is written in ncert class 12 page no.188 chapter name is microbes in human welfare

Mohsin Patel answered Apr 09, 2020
I think answer should be A and not D....

As oscillatoria is a member of cyanobacteria....

Vishwani Damathia answered Sep 05, 2018
Azopirillum
Azopirillum is a nitrogen-fixing bacterium in paddy fields. It is very useful soil and root bacterium. It is an associative symbiotic N2 -fixing bacteria. When it is added to the soil, it multiplies in millions and can supply 20-40 kg of nitrogen per hectare per season. It also produces growth promoting substance like Indole Acetic acid (IAA). Gibberellins and promotes root proliferation. These substances improve the plant growth and yield.

Sukanya Bhardwaj answered 4 weeks ago
Azospirullm.D right answer

Supriya Yadav answered Mar 18, 2020
Azospirilum is free living Nitrogen fixing bacteria

Wahid Khan answered Jan 17, 2020
Nitrogen is obtained by plants either in nitrate or nitrite forms. Some microbes convert atmospheric nitrogen into nitrate and nitrite. The common nitrogen-fixing microbe in paddy field is Azospirillum.

Trishaa Gopalakrishnan answered 1 week ago
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Ashok Pindi answered 3 weeks ago
Azospirillum is a nitrogen fixing bacterium in paddy fields.it is very useful soil and root bacterium.it is an associatve symbiotic N2 -fixing
bacteria.when it is added to the soil,it multiples in millions and can supply 20-40kg of nitrogen per hectare per season.

Lalit Kumar Sarin answered 8 hours ago
Yes azospirillum..... it does nitrogen fixation in soil in paddy Field

Dora Ravi answered 3 weeks ago
They can synthesize phytohormone specially Indole 3 acetic acid and gibberline helps in promoting root proliferation

Aniket Das answered Sep 14, 2018
Cyanobacteria that is oscillatoria

Pallavi Patil answered Feb 05, 2020
Ans is Dnbcz we use azospirillum as a biofertilizer in paddy fields as it promotes the growth in rice plant's

Adithya Shasan answered Feb 28, 2020
Option D : Azospirillum

Veeradasari Charishma De answered Mar 20, 2020
But according to ncert in paddy fields common nitrogen fixers are cyanobacteria .so my answer is option A

Sheetal Singh answered 4 weeks ago
It used as biofertilizer in rice fields. It promotes the plant growth. there are certain nitrogen fixing bacteria which converts atmospheric nitrogen into ammonium compounds and make it available to the plants.

Sanvi Patel answered Mar 23, 2020
Atmospheric nitrogen is not available to plants. There are certain nitrogen-fixing bacteria that converts atmospheric nitrogen into ammonium compounds and make it available to the plants. Examples include 
Azotobacter, Frankia, Rhizobium, Azospirillum
. Out of these, 
Azospirillum 
is widely used as a nitrogen fixer organism in paddy fields. It is used as biofertilizer in rice fields. It promotes plant growth.
Thus, the correct answer is 'Azospirillum.'

Pallavi Bopche answered 3 weeks ago
Azospirillum is a nitrogen fixing bacterium in paddy fields . It is very useful to soil and root bacterium. It is an associative symbiotic fixing bacteria. When it added to soil it multiplies in million and can supply 20 to 40 kg of nitrogen per hectare per season.

I hope this will help you.

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Shivani Kumawat answered Apr 08, 2020
Because it is a free living nitrogen fixer +nt in the soil

Dinesh Kumar answered Mar 22, 2020

Hajra Syed answered 4 weeks ago
It's given in ncert

Parveen Princess answered Apr 24, 2020
Options D.is correct answer .. because it is a nitrogen - fixer in paddy fields

Dileep Ravula answered 3 weeks ago
Correct anwser is d

Adit Raj answered Dec 10, 2018

Bolla Nagamalleswari answered Apr 28, 2019
Oscillators is correct

Ambarish Adhikari answered Feb 05, 2020
The answer should be option a because oscillatoria is a cyanobacteria and cyanobacteria are important biofertiliser in paddy field

Vishal Kumar answered Feb 28, 2020
The common Nitrogen fixer in paddy fields is
Rhizobium,Azospirillum.

These are the bacterias which help in good growth of roots and fertile soil.

I Pathan answered 3 weeks ago
Azispirillium

Anbuganapathi A answered 3 weeks ago
Paddy does not have root nodules

Palla Haripriya answered 1 week ago
Azospirillum. Once refer NCERT.

Madhu Bindu answered 4 weeks ago
I think it is Rhizobium ..... am I wrong

Lalhriatzuali Nutei answered 4 weeks ago
A must be the answer

Mahi Tabahi Gaming answered 2 weeks ago
Cyanobacteria is common nitrogen fixer in paddy field so according to examples of cyanobacteria oscillatoria is correct option

Joel Raj answered 4 weeks ago
It forms root nodules and fixes atmospheric nitrogen

Rohitha Rohi answered 3 weeks ago
Atmospheric nitrogen is not available to plants. There are certain nitrogen fixing bacteria which converts atmospheric nitrogen into ammonium compounds and make it available to the plants. Examples include Azotobacter, Frankia, Rhizobium, Azospirillum. Out of these, Azospirillum is widely used as nitrogen fixer organism in paddy fields. It is used as biofertilizer in rice fields. It promotes the plant growth.
Thus, the correct answer is 'Azospirillum.'

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