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प्रश्न
How is nitrogen replenished in atmosphere.
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उत्तर
Nitrogen is replenished in the atmosphere by the process of denitrification. Decomposers or dentrifying bacteria, such as Pseudomonas, reduce nitrates back to nitrogen or ammonia or some other oxides. Free nitrogen returns to the atmospheric pool, and oxides are taken up by the plants.
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संबंधित प्रश्न
Define chemoautotrophs.
Draw diagram of Nitrogen cycle.
Nitrogen is a greenhouse gas.
How do human activities affect nitrogen cycle?
The nitrogen molecules present in the air can be converted into nitrates and nitrites by
Give reason for the following.
Farmers prefer to grow beans and peas in nitrogen deficient soils.
Match Column - I with Column - II.
| Column - I | Column - II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobacter | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below.
The atmosphere is a rich source of ______.
The blue-green algae that take part in nitrogen fixation are also called ______.
Name any two nitrifying bacteria in soil.
