Which one of the following is not used in organic farming?
Which one of the following is not used in organic farming?
- A
Snail
- B
Glomus
- C
Earthworms
- D
Oscillatoria
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Reason : Leguminous plants have Rhizobium in their root nodules.
- [AIIMS 1997]
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Crop rotation is carried out for
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