Question

Which of the following is not used in organic farming?

• A. Snail
• B. Earthworm
• C. $Oscillatoria$
• D. $Glomus$

Answer 1

The correct option is A Snail

Definition of organic farming
Organic farming is a type of sustainable farming method that uses natural fertilisers and pesticides to grow crops. The use of microbes as fertilisers, pesticides and the use of naturally resistant crops are some of the main approaches of organic farming.

Role of earthworm in organic farming
Earthworm improves the aeration in soil, water infiltration and soil structure. This enhances plant growth.

Role of $Oscillatoria$ in organic farming
Blue-green algae like Anabaena, Nostoc, Oscillatoria etc. have the ability to fix atmospheric nitrogen thus increasing the soil fertility.

Role of snail in organic farming
Snails have no role to play in organic farming. They are pests for plants.

Role of $Glomus$ in organic farming
Fungi usually from the genus $Glomus$ form symbiotic associations with the plant roots. These fungi take phosphorus from the soil and pass it to the plant, enhancing plant growth and development.
Final answer
(C) Snail