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Which one of the following statements is correct ?A. At present it is not possible to grow maize without chemical fertilizersB. Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodiesC. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plantsD. Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil |
| Answer» Correct Answer - B | |