Question

Biofertilisers are preferred to chemical fertilisers Chemical fertilisers are generally more expensive and hazardous to environment

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (A)

If both assertion and reason are true and reason is the correct explanation of assertion

Answer 2

Biofertilisers are microorganisms that are used for increasing fertility of soil. For example, free-living bacteria and cyanobacteria that fix nitrogen increase soil productivity. Biofertilisers are preferred over chemical fertilisers because chemical fertilisers are more expensive, disturb soil fauna and flora and affect soil pH. Although chemical fertilisers initially show better response than biofertilisers but they decrease soil fertility in the long run