Which nitrogen fixing bacteria is found in root association of maize

Options :
  1. Aulosira
  2. Azotobactor
  3. Azospirillum
  4. none of these
Answer and Explanation :-

Answer: Option 3

Explanation:

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I think we're part of a greater wisdom that we will ever understand a higher order, call it what you want. Know what I call it? The Big Electron. It doesn't punish, it doesn't reward, it doesn't judge at all. It just is.
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