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  1. Which of the following is also used as a Bio fertilizer?

  2. A.

     Urea

    B.

     Ammonia

    C.

     Uric Acid

    D.

     None of these

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    Answer : Option D

    Explanation :

    Biofertilizers such as Rhizobium, Azotobacter, Azospirilium and blue green algae (BGA) have been in use a long time. Rhizobium inoculant is used for leguminous crops. Azotobacter can be used with crops like wheat, maize, mustard, cotton, potato and other vegetable crops.


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