Question

Which of the following fixes nitrogen in
waterlogged soil?​

Answer 1

Answer:

Aerobic Bacteria genus Clostridi fixes nitrogen in water logged soil.

Answer 2

Answer:

Nitrogen fixation occurs in waterlogged soil by both the Heterotrophic bacteria and the autotrophic organism, and their influence is directly proportional to the different favorable conditions which help in fixing the nitrogen.

• Heterotroph Bacteria- consist of Azotobacter (Aerobic bacteria) and Clostridium (Anaerobic bacteria)

• Autotrophic organism- consists of Blue-green algae and photosynthetic bacteria.

Explanation: The growth of blue-green algae often takes place in large quantities when the soil becomes water-logged. There is a requirement for both heterotrophic bacteria like azotobacter and clostridium and autotrophic organisms like Blue-green algae is counted in terms of favorable conditions to fix nitrogen.

• Studies show that when there is an absence of organic matter, the heterotrophic process of bacteria appears to be subdued, and the presence of light leads to the efficient functioning of Blue-green algae that utilizes light energy and fixes the nitrogen. Blue-green algae and photosynthetic bacteria seem to increase in number during this time.

• When plenty of organic matter for the bacteria is present, Nitrogen fixation occurs by heterotrophic bacteria, which overcomes the Blue-green algae, and nitrogen fixation depends entirely upon heterotrophic bacteria in this case.