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26/10/2021 3:54 pm
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Farmers have reported over 50% higher yields of rice by using the biofertilizer
(1) Legume-Rhizobium symbiosis
(2) Azolla pinnata
(3) Mycorrhiza
(4) Cyanobacteria
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26/10/2021 3:55 pm
Correct answer: (2) Azolla pinnata