Question

The common biofertiliser used in organic farming is:

• A. Margosa
• B. Pyrethrum
• C. Cyanobacteria
• D. Nitrogen-fixing bacteria

Answer 1

Answer: (C), (D)

The correct options are
C

Cyanobacteria

D

Nitrogen-fixing bacteria

The common biofertiliser used in organic farming is cyanobacteria and nitrogen-fixing rhizobium. Both these microbes fix the atmospheric nitrogen and increase the soil fertility naturally. Margosa is neem plant, which is mostly used as a biopesticide and not as biofertiliser. Pyrethrum is a plant (Chrysanthemum) and is applied to the skin as an insecticide to remove head lice, mites, etc.