Which of the following is not a microbial fertiliser?

Rhizobium

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Azotobacter

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Azolla

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Azospirillum

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Solution

The correct option is C
Azolla

Microbial fertilisers are soil additives that contain microorganisms. When added to the soil, it enhances its fertility by converting complex organic compounds into simple ones that are easily utilised by the plants. Bacteria like Rhizobium, Azotobacter and Azotospirillum are used in the preparation of microbial fertilisers. Azolla is an aquatic plant which is used as a biofertiliser.

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B	$G l o m u s$	2	Biological control tools
C	$A n a b a e n a$ and $N o s t o c$	3	Forms mycorrhiza
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N_{2}

Which among the following is not a microbial enzyme

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