The common nitrogen­fixer in paddy fields is

  • [AIPMT 2010]
  • A

    Rhizobium

  • B

    Azospirillum

  • C

    Oscillatoria

  • D

    Frankia.

Similar Questions

The best fertilizer for paddy is

Azolla is used as a biofertiliser because it

  • [AIIMS 2018]

Root nodules for nitrogen fixation of a non-leguminous tree possess

Farmers have reported $50\%$  higher yield of rice by using biofertilizer

  • [AIPMT 1998]

Which of the following is used as biofertiliser?

$I.$ Cyanobacteria

$II.$ Yeast

$III.$ Symbiotic bacteria

$IV.$ Free living bacteria

Choose the correct option