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Which is correct?A. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.B. Cyanobacteria, Anabuena and Nostoc are mobilizers ol phosphates and plant nutrition in soil.C. At. present it is not possible to grow Maize without chemical fertilizers.D. Excessive use of chemical fertilizers may lead to eutrophication of nearby water bodies.

Answer» Correct Answer - D
Rhizobium fix atmospheric nitrogen in root nodules of plants while Azotobacter is free living.
Cyanobacteria, Anabaena and Nosloc free living `N_2`- fixers.
At present it is possible to grow Maize without chemical fertilizers.


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