Which of the following statements is correct?

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(A) Statement $A$ is correct. Excessive use of chemical fertilizers leads to nutrient enrichment (especially nitrogen and phosphorus) in water bodies,

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Excessive use of chemical fertilizers leads to eutrophication in nearby water bodies.

Vedclass · Answer

(A) Statement $A$ is correct. Excessive use of chemical fertilizers leads to nutrient enrichment (especially nitrogen and phosphorus) in water bodies,causing algal blooms and eutrophication.Statement $B$ is incorrect because $Azotobacter$ is a free-living nitrogen-fixing bacterium,while $Rhizobium$ is a symbiotic bacterium found in root nodules.Statement $C$ is incorrect because cyanobacteria like $Anabaena$ and $Nostoc$ are primarily nitrogen fixers,not phosphate or potassium mobilizers.Statement $D$ is incorrect because organic farming practices allow for the cultivation of maize without chemical fertilizers.

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