Q. Which of the following statement is correct?
A) Cyanobacteria such as Anabaena and Nostoc are important mobilisers of phosphates and potassium for plant nutrition in soil
B) At present it is not possible to grow maize without chemical fertilisers
C) Extensive use of chemicals fertilisers may lead to eutrophication of nearby water bodies
D) Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants
Explanation
Excess fertilizer in the environment, especially nitrogen and phosphorus, can pollute local ground water as well as lakes and streams, resulting in eutrophication
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.