Question

Farmers have reported 50% higher yield of rice by using which bio-fertilizer?

• A. Azolla pinnata
• B. Legume - Rhizobium symbiosis
• C. Cyanobacteria
• D. Mycorrhiza

Answer 1

Answer: (A)

Azolla pinnata

Azolla pinnata contains Anabaena azollae in its leaf cavities, which fixes atmospheric nitrogen and helpful in increasing nitrogen content in rice. Farmers have reported over 50% higher yields by using Azolla as a biofertilizer.

So, the correct answer is option A.