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Which one of the following statements is...

Which one of the following statements is correct?

A

Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.

B

Cyanobacteria such as Anabaeena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.

C

At present it is not possible to grow maize without chemical fertilizers

D

Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies.

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