Haryana PMT Haryana PMT Solved Paper-2010

  • question_answer A water ferm which is used as a green manure in rice fields is

    A)  Salvinia               

    B)  Mucor

    C)  Aspergillus       

    D)  Azolla

    Correct Answer: D

    Solution :

                    The leaves of Azolla (water fem) contain upto 80,000 Anabaena, which fix atmospheric nitrogen and make it available to Azolla which, in turn, makes it available to soil on decomposition. This is used as a precious green compost for rice cultivation.


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