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  1. Farmers have reported over 50% higher yields of rice by using the biofertilizer
    1. Azolla pinnata
    2. Cyanobacteria
    3. Legume-Rhizobium symbiosis
    4. Mycorrhiza
Correct Option: A

Farmers have reported over 50% higher yields of rice by using the biofertilizer Azolla pinnata.



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