Advertisements
Advertisements
प्रश्न
Write a note on nitrogen fixation?
Advertisements
उत्तर
The process of bio-fixation of nitrogen is called nitrogen fixation. It is usually carried out by industrial nitrogen fixation, i.e., manufacturing of ammonium salts and urea or chemical fertilisers or by nitrogen-fixing bacteria (Azotobacter and Rhizobium). These bacteria convert the atmospheric nitrogen into water-soluble nitrates for the use of plants.
APPEARS IN
संबंधित प्रश्न
Give the schematic representation of the TCA cycle.
Blue green algae fix _________ directly from air to enhance fertility of soil.
Match the following.
| Microorganism | Role Played |
| Nitrosomonas | Nitrogen fixation |
| Azotobacter | Ammonification |
| Pseudomonas species | Nitrification |
| Putrefying bacteria | Denitrification |
How do human activities affect nitrogen cycle?
Polio drops are not given to children suffering from diarrhoea. Why?
In the nitrogen cycle, which of the following play an important role?
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.
Free-living soil bacteria such as Pseudomonas sp. are responsible for the ______ process in the nitrogen cycle.
The bacteria present in the root nodules of leguminous plants is ______.
Name any two nitrifying bacteria in soil.
