An organism used as a biofertilizer for raising soyabean crop is

  • [AIPMT 2011]
  • A

    Azotobacter

  • B

    Azospirillum

  • C

    Rhizobium

  • D

    Nostoc.

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  • [AIPMT 1994]

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Mycorrhiza represents

  • [AIPMT 1994]

Which of the following is not a symbiotic nitrogen fixing bacterium?

Which of the following serve as biofertiliser in paddy fields?