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25/09/2020 4:12 pm
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Azolla is used as a biofertilizer because it
(a) multiplies very fast to produce massive biomass
(b) has association of nitrogen-fixing Rhizobium
(c) has association of nitrogen-fixing Cyanobacteria
(d) has association of mycorrhiza
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25/09/2020 4:13 pm
(c) has association of nitrogen-fixing Cyanobacteria
Explanation:
Azolla, has cyanobacteria which is the nitrogen fixing bacteria. Due to this Azolla is able to fix the nitrogen as nitrates, thereby making it available to plants in the soluble form of nitrogen.