Which of the following statements is correct?

  • A
    It is impossible to grow maize today without chemical fertilizers.
  • B
    Excessive use of chemical fertilizers leads to eutrophication in nearby water bodies.
  • C
    Both Azotobacter and Rhizobium fix atmospheric nitrogen in the root nodules of plants.
  • D
    Blue-green algae like Anabaena and Nostoc are important organisms that mobilize phosphate and potassium for plant nutrition in the soil.

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