Which one of the following is not a biofertilizer?

Agrobacterium

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Rhizobium

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Nostoc

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Mycorrhiza

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Solution

The correct option is A Agrobacterium
Agrobacterium is not a biofertilizer. It causes crown gall disease in plants because of which it is most extensively used in biotechnology for the gene transfer and its expression. Nostoc, Rhizobium and Mycorrhiza is associated with roots of plants and converts the atmospheric Nitrogen into nitrites and nitrates and make it available for the plants.
So, the correct answer is option A.

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