641ForestryMedium
Azolla is used as a biofertilizer because it:
AHas association nitrogen fixing Cyanobacteria
BMultiplies very fast to produce massive biomass
CHas association of nitrogen-fixing Rhizobium
DHas association of mycorrhiza
Correct answer
A. Has association nitrogen fixing Cyanobacteria
Explanation
The correct answer is Has association nitrogen fixing Cyanobacteria.