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प्रश्न
Which one of the following is not a nitrogen-fixing organism?
पर्याय
Anabaena
Nostoc
Azotobacter
Pseudomonas
Rhizobitim
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उत्तर
Pseudomonas
Explanation:
- Pseudomonas is a common soil bacterium but does not fix atmospheric nitrogen.
- Nostoc, Anabaena, and Rhizobium are nitrogen-fixing organisms that convert atmospheric nitrogen (N2) into usable forms for plants.
Hence, Pseudomonas is not a nitrogen-fixing organism.
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संबंधित प्रश्न
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?
Your advice is sought to improve the nitrogen content of the soil to be used for cultivation of a non-leguminous terrestrial crop.
- Recommend two microbes that can enrich the soil with nitrogen.
- Why do leguminous crops not require such enrichment of the soil?
Identify free-living bacterial bio-fertilizer.
Which one of the following is a free-living bacterial biofertilizer?
Name any two bacterial biofertilizers.
State any three benefits of Biofertilizers.
Match the column A with B and rewrite correct pairs.
| A | B | |
| i. | Symbiotic N2 fixing bacteria | VAM |
| ii. | Free-living N2 fixing bacteria | Rhizobium |
| iii. | Phosphate solubilizer | Nostoc |
| iv. | Endomycorrhizae | Microccocus |
Identify the CORRECT statement regarding Ectomycorrhizae.
Which of the following is/are symbiotic nitrogen fixing microbe?
Anabaena forms symbiotic relationship coralloid roots of ______.
Mycorrhiza forms symbiotic association with ____________ of higher plants.
The biological agent which is used to kill or check proliferation of disease causing agents is called ____________.
VAM is a type of ______
Which of the following symbiotic microorganisms is nitrogen-fixing?
Glomus is a ______.
Mycorrhiza does not help the host plant in ______.
Give two examples of biofertilizer.
Which one of the following statement is correctly matched?
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
Which of following organisms cannot fix nitrogen?
- Azotobacter
- Oscillatoria
- Anabaena
- Volvoх
- Nostoc
Choose the correct answer from the options given below:
How many of the following are the symbiotic nitrogen fixing micro-organisms?
Rhizobium, Anabaena, Frankia, Azotobacter, Nostoc, Clostridium, Beijerinckia, Klebsiella
Which of the following bacteria do not solubilize the insoluble rock phosphate?
How many statements are true about biofertilizers?
- They are nitrogen fixers.
- They are commercial preparation of live bacteria and fungi.
- Use of biofertilizers is expensive.
- There is only one type of biofertilizer.
- They are classified as inorganic.
Which of the following is NOT a primary benefit of using biofertilizers in agriculture?
How do biofertilizers differ from chemical fertilizers in their effect on soil microorganisms?
How do the functions of Frankia compare to those of Rhizobium in nitrogen fixation?
What is the fundamental characteristic that defines biofertilizers as living organisms?
