1.

Question : Azolla is used as 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.

Answer»

MULTIPLIES very fast to PRODUCE massive biomass
has ASSOCIATION of nitrogen FIXING rhizobium
has association of nitrogen - fixing cyano bacteria.
has association of MYCORRHIZA.

Solution : has association of nitrogen - fixing cyano bacteria.


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