Chemistry
Grade-6
Easy
Question
Which of the following is not the application of nitrogen fixation?
- Increase in soil fertility
- Increase in the humus contents of the soil
- Increase in the number of microorganisms like rhizobium and fungi
- Increase in the quantity of oxygen in the air
Hint:
Nitrogen fixation bacteria like rhizobium have a symbiotic association with legume plants.
The correct answer is: Increase in the quantity of oxygen in the air
Increase in the quantity of oxygen in the air is not the application of nitrogen fixation.
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