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Question
Which of the following increase the fertility of soil ?
A. Lactobacillus bacteria
B. Rhizobium bacteria
C. Spirogyra algae
D. Blue-green algae
Which of the following increase the fertility of soil ?
A. Lactobacillus bacteria
B. Rhizobium bacteria
C. Spirogyra algae
D. Blue-green algae
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Solution
The correct option is B B and D
- Correct option: (d) B and D.
- Atmospheric nitrogen cannot be used directly by plants.
- Bacteria like Rhizobium present in the root nodules of leguminous plants helps in the nitrogen fixation.
- Certain bacteria like blue-green algae present in the soil, fix nitrogen from the atmosphere and convert it into usable compounds of nitrogen.
- Correct option: (d) B and D.
- Atmospheric nitrogen cannot be used directly by plants.
- Bacteria like Rhizobium present in the root nodules of leguminous plants helps in the nitrogen fixation.
- Certain bacteria like blue-green algae present in the soil, fix nitrogen from the atmosphere and convert it into usable compounds of nitrogen.
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