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Biofertilizers - class-XII
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Which one of the following is not a nitrogen-fixing organism ?
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A
Pseudomonas
💡 Explanation:
Anabaena, Nostoc and Azolobacter help in nitrogen fixation. But Pseudomonas perform Denitrification which is the reduction of nitrates back into Nitrogen gas.
So, the correct option is 'Pseudomonas'