Which of the following statements is correct?

  • A
    $Azospirillum$ and $Azotobacter$ live as symbionts,they fix atmospheric nitrogen and thus enrich the nitrogen content of the soil.
  • B
    Many members of the genus $Monascus$ form mycorrhiza.
  • C
    Heterotrophic cyanobacteria are used as biofertilizers in paddy fields.
  • D
    Many members of the genus $Glomus$ form mycorrhiza.

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Which organism is highly useful for soil fertility?

Which of the following statements is incorrect?

Organic farming includes:
$I.$ Use of biofertilisers and biopesticides
$II.$ Crop rotation
$III.$ Locally developed pest-resistant varieties
Choose the correct option.

In which of the following crops is $BGA$ (Blue-Green Algae) primarily used as a biofertilizer?

Modern farmers have been able to increase rice production by about $50\%$ by using which of the following?

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