MCQ
Azolla is used as a biofertilizer because it
- AMultiplies very fast to produce massive biomass
- BHas association of nitrogen-fixing Rhizobium
- ✓Has association of nitrogen-fixing cyanobacteria
- DHas association of mycorrhiza
✓
Answer
Correct option: C.
Has association of nitrogen-fixing cyanobacteria
c
The leaves of Azolla (fern) have as many as $80,000$ blue-green algae belonging to Anabaena azollae, which have the capacity to fix atmospheric nitrogen and make it available to Azolla. Azollapinnata is an excellent biofertilizer for rice. Farmers may have reported $50\, \%$ increase in yield of rice by using this biofertilizer.
The leaves of Azolla (fern) have as many as $80,000$ blue-green algae belonging to Anabaena azollae, which have the capacity to fix atmospheric nitrogen and make it available to Azolla. Azollapinnata is an excellent biofertilizer for rice. Farmers may have reported $50\, \%$ increase in yield of rice by using this biofertilizer.
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