Farmers have reported over 50% higher yields of rice by using which of the following biofertilisers?

Bacillus thuringiensis

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Legume-Rhizobium symbiosis

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Mycorrhizae

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Azolla pinnata

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Solution

The correct option is A Azolla pinnata
Azolla pinnate is a small free-floating freshwater fern which is widely used as a biofertiliser in Indian rice fields. So, the correct answer is D.

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