A) Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies
B) Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants
C) Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in soil
D) At present it is not possible to grow maize without chemical fertilizers
Correct Answer: A
Solution :
Eutrophication is caused by run off water from fertilized fields suburban lawns, feed lots and detergent rich sewage. It is phenomenon of nutrient enrichment of a water body.
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