Among the following, which one is recently discovered non-legume nitrogen-fixing bacterium?

Azotobacter paspali

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Rhizobium

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Nitrosomonas

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Spirillum

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Solution

The correct option is A Azotobacter paspali
Azotobacter paspali is the species of Azotobacter genus. It is recently discovered non-legume nitrogen-fixing bacteria. It independently fixes the atmospheric nitrogen and makes it available for the plants. Rhizobium fixes atmospheric nitrogen in association with legume plants. Nitrosomonas convert ammonia into nitrites.
Thus, the correct answer is 'Azotobacter paspali.'

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