Q. Which of the following statement is correct?
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
Explanation
Eutrophication is a natural state in many lakes and ponds, which have a rich supply of nutrients. Generally, it occurs due to excessive use of chemical fertilizers and causes foul smell of water and death of aquatic organisms.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.