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प्रश्न
Give reason for the following.
Farmers prefer to grow beans and peas in nitrogen deficient soils.
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उत्तर
Beans and peas are leguminous plants as they have Rhizobium, a bacteria in their root nodules. This bacteria can fix atmospheric nitrogen to enrich the soil with nitrogen and increase its fertility.
Farmers grow leguminous plants in between the major crops, a practice called crop rotation to restore the used nutrients of the soil.
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संबंधित प्रश्न
Blue green algae fix _________ directly from air to enhance fertility of soil.
Explain the following cycle in your own words with a suitable diagram.
Nitrogen cycle.
Very Short Answer Question:
What is denitrification?
Match the following.
| Microorganism | Role Played |
| Nitrosomonas | Nitrogen fixation |
| Azotobacter | Ammonification |
| Pseudomonas species | Nitrification |
| Putrefying bacteria | Denitrification |
How do human activities affect nitrogen cycle?
The process of nitrogen-fixation by bacteria does not take place in the presence of
Why should we avoid standing close to a tuberculosis patient while he/she is coughing?
In the Nitrification process, the ammonium compounds are oxidised to soluble ______.
How are organisms like Pseudomonas and Thiobacillus of great significance in nitrogen cycle?
Match the following:
| Column A | Column B (Organisms) | ||
| (1) | Symbiotic nitrogen fixation | (a) | Nitrobacter |
| (2) | Denitrification | (b) | Cyanobacteria |
| (3) | Free living nitrogen fixers | (c) | Rhizobium |
| (4) | Nitrification | (d) | Paracoccus |
