The free-living anaerobic nitrogen-fixing bacterium is . . . . . . .

  • A
    Beijerinckia
  • B
    Rhodospirillum
  • C
    Rhizobium
  • D
    Azotobacter

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Which one of the following elements plays an important role in biological nitrogen fixation?

$a + 8e^- + b + 16 \, ATP \rightarrow c + d + 16 \, ADP + 16 \, \Pi$

Soil fertility can be increased by ..........

Which of the following is a free-living,aerobic,and non-photosynthetic nitrogen-fixing bacterium?

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