Home
Class 12
BIOLOGY
Assertion : Biofertilisers are preferred...

Assertion : Biofertilisers are preferred to chemical fertilisers.
Reason : 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

Text Solution

Verified by Experts

The correct Answer is:
A
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 fertiliser are more expensive, disturb soil fauna and flora and affects soil pH. Although chemical fertilisers initiallty show better response than biofertilisers but they decreases soil fertility in the long run.
Promotional Banner

Similar Questions

Explore conceptually related problems

Biopesticides are preferred over chemical pesticides due to their

Chemical fertilisers and Biofertilisers.

Assertion: Platyhelminthes are generally hermaphrodites. Reason: In Platyhelminthes, fertilisation is internal.

Assertion: The stage between the two meiotic divisions is called interkinesis. Reason: Interkinesis is generally short lived.

The reason that the chemical/synthetic fertilisers should be replaced by biofertilisers is that the former

Assertion : Metabolism refers to the sum of chemical reaction that occur within living organisms. Reason : Metabolic reactions occur simultaneously inside living organisms.

Assertion: Variations are important for the process of evolution. Reason: Meiosis increases the genetic variability in the population of organisms from one generation ot the next.

Assertion: Temperature and soil moisture are the important climatic factors that regulate the process of decomposition. Reason: Warm and moist environment favours decomposition whereas low temperature and anaerobiosis inhibit decomposition.