Which one of the following statements is cor- rectA. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.B. Cyanobacteria such as Anabaeena and Nostoc are important mobilizers of phos- phates and for plant nutrition in soil.C. At present it is not possible to grow maize without chemical fertilizersD. Extensive use of chemical fertilizers may tead to eutrophication of nearby water bodies.

Which one of the following statements is cor- rectA. Both Azotobacter

1.	Which one of the following statements is cor- rectA. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.B. Cyanobacteria such as Anabaeena and Nostoc are important mobilizers of phos- phates and for plant nutrition in soil.C. At present it is not possible to grow maize without chemical fertilizersD. Extensive use of chemical fertilizers may tead to eutrophication of nearby water bodies.
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