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Farmers have reported over 50% higher yi...

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

A

Bacillus thuringiensis

B

Lagume-Rhizobium symbiosis

C

Mycorrhizae

D

Azolla pinnata

Text Solution

Verified by Experts

The correct Answer is:
D
Azolla pinnata is a small free floating freshwater fern which multiplies rapidly, doubling every 5-7 days. The fern can live with Anabaena symbiotically in rice field to fix atmospheric nitrogen. It does not interfere with their growth. In some South-East Asian countries, especially China, the rice fields are regularly provided with Azolla.
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