Home
Class 12
BIOLOGY
The common nitrogen-fixer in paddy field...

The common nitrogen-fixer in paddy fields is

A

Rhizobium

B

Azospirillum

C

Oscillatoria

D

Frankia

Text Solution

Verified by Experts

The correct Answer is:
B
Azoespirilllum is a nitrogen fixing bacterium in paddy fields. It is very useful soil and root bacterium. It is associative symbiotic `N_(2)` fixing bacteria. When it is added to the soil, it multiplies in millions and can supply 20-40kg of nitrogen per hectare per season. It also producess growth promoting substanes like indole acetic acid (IAA), Gibberellins `(GA_(3))` and promotes root proliferation. these substances improve the plant growth and yield.
Promotional Banner

Similar Questions

Explore conceptually related problems

Nitrogen is

Nitrogen fixation is

Nitrogen fixation is

Which of following microbe is most active nitrogenj fixer in rice field in India?

Which of the following microbes serve as an important biofertiliser in paddy fields ?

Nitrogen dioxide

Which one is a nitrogen fixer?

Which one is a nitrogen fixer?

Why are cyanobacteria considered useful in paddy fields ?

Which out of the following is a symbiotic nitrogen fixer and enriches the soil with soil nitrogen?