Biofertilizers include:

  • A
    Cow dung manure and farmyard waste
  • B
    $A$ quick-growing crop ploughed back into the soil (Green manure)
  • C
    $BGA$ (Blue-Green Algae),Anabaena,and Azolla
  • D
    All of the above

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Due to which of the following organisms is the yield of rice increased?

Biofertilizers include:

By what percentage does crop productivity increase with the use of biofertilizers?

Which of the following aquatic ferns is used as an excellent biofertilizer?

Which substance of biological origin is used to maintain and increase soil fertility?

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