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Which one of the following is not used in organic farming?
A
Snail
B
$Glomus$
C
Earthworm
D
$Oscillatoria$
Detailed Solution
Organic farming uses biofertilisers and natural processes in place of chemical fertilisers.
$Glomus$ is a fungus that forms mycorrhiza and helps the plant to absorb phosphorus.
$Oscillatoria$ is a nitrogen-fixing cyanobacterium that adds organic matter and nitrogen to the soil.
Earthworms break down organic matter and are used to make vermicompost.
Snails are not used; they feed on crop plants and are pests.
Hence the snail is not used in organic farming.
$Glomus$ is a fungus that forms mycorrhiza and helps the plant to absorb phosphorus.
$Oscillatoria$ is a nitrogen-fixing cyanobacterium that adds organic matter and nitrogen to the soil.
Earthworms break down organic matter and are used to make vermicompost.
Snails are not used; they feed on crop plants and are pests.
Hence the snail is not used in organic farming.