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प्रश्न
Which one of the following is not a nitrogen-fixing organism?
विकल्प
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
Microbes can be used to decrease the use of chemical fertilisers and pesticides. Explain how this can be accomplished.
Find out the role of microbes in the following:
Soil
How do biofertilisers enrich the fertility of the soil?
What is a heterocyst?
How does the application of cyanobacteria help improve agricultural 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?
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
______ associated with plants like Azolla and Cycas can be used as a biofertilizers.
State any three benefits of mycorrhiza.
State any three benefits of Biofertilizers.
identify the plants with which Anabaena, is associated.
Identify the CORRECT statement regarding Ectomycorrhizae.
Blue green algae are used as bio fertilizers because they ____________.
An organism used as a biofertiliser for raising soyabean crop prediction is:
Which one of the following is not a biofertilizer?
Soil microorganisms mainly comprise:
Why are blue green algae not popular as biofertilisers?
Match the pairs:
| Column A | Column B | ||
| (i) | Compost making biofertilizer |
(a) | Azotobacter |
| (ii) | N2 fixing biofertilizer | (b) | Mycorrhiza |
| (iii) | Fungal biofertilizer | (c) | Agrobacterium |
| (iv) | Phosphate solubilizing biofertilizer |
(d) | Actinobocteria |
Which one of the following statement is correctly matched?
Which of following organisms cannot fix nitrogen?
- Azotobacter
- Oscillatoria
- Anabaena
- Volvoх
- Nostoc
Choose the correct answer from the options given below:
Endomycorrhizae grow in ______ of higher plants.
Which cyanobacterium lives in association with the water fern Azolla and is widely used in paddy fields?
Which organisms are classified as nitrogen-fixing microbes that convert atmospheric nitrogen into usable forms?
