Which one is a green manure or biofertilizer?

Azolla is used as a biofertilizer because it

Which one of the following is $NOT$ a bacterial biofertilizer?

Match the following columns:

Column-$I$	Column-$II$
$(a)$ Azospirillum	$(1)$ Symbiotic bacteria
$(b)$ Cyanobacteria	$(2)$ Free-living bacteria
$(c)$ Rhizobium	$(3)$ Mycorrhiza
$(d)$ Glomus	$(4)$ Autotrophic microbe

Organic farming includes:
$I.$ Use of biofertilisers and biopesticides
$II.$ Crop rotation
$III.$ Locally developed pest-resistant varieties
Choose the correct option.

Some blue-green algae can be used as biofertilizers because they are: