Biofertilisers include

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Question

(A) Biofertilisers are organisms that enrich the nutrient quality of the soil. Main sources of biofertilisers are bacteria,fungi,and cyanobacteria. $R

Vedclass · Accepted Answer

Blue-green algae,Rhizobium,other nitrogen-fixing bacteria and mycorrhiza

Vedclass · Answer

(A) Biofertilisers are organisms that enrich the nutrient quality of the soil. Main sources of biofertilisers are bacteria,fungi,and cyanobacteria. $Rhizobium$ is a symbiotic nitrogen-fixing bacterium found in the root nodules of leguminous plants. Other nitrogen-fixing bacteria include $Azospirillum$ and $Azotobacter$. Blue-green algae (cyanobacteria) like $Anabaena$,$Nostoc$,and $Oscillatoria$ also fix atmospheric nitrogen. Mycorrhiza is a symbiotic association between fungi (e.g.,$Glomus$) and roots of higher plants,which helps in phosphorus absorption. Therefore,the correct group includes Blue-green algae,$Rhizobium$,other nitrogen-fixing bacteria,and mycorrhiza.

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

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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

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