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प्रश्न
Why are cyanobacteria considered useful in paddy fields?
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उत्तर
Cyanobacteria are autotrophic microbes widely distributed in aquatic and terrestrial environments many of which can fix atmospheric nitrogen e.g. Anabaena, Nostoc, Oscillatoria, etc. In paddy fields, cyanobacteria serve as an important biofertiliser. Blue-green algae also add organic matter to the soil and increase its fertility.
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संबंधित प्रश्न
What are 'biofertilizers'? Explain them with suitable examples.
How does the application of the fungal genus, Glomus, to the agricultural farm increase the farm output?
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
Identify free-living bacterial bio-fertilizer.
Identify the CORRECT statement regarding Mycorrhiza.
Match the Column I (Organisms) with the Column II (Products they produce) and select the correct option.
| Column I | Column II | ||
| i. | Lactobacillus | p. | Cheese |
| ii. | Saccharomyces cerevisiae | q. | Curd |
| iii. | Aspergillus niger | r. | Citric Acid |
| iv | Acetobacter aceti | s. | Bread |
| t. | Acetic Acid |
In plant breeding, biofortification is a method ____________.
The biological agent which is used to kill or check proliferation of disease causing agents is called ____________.
Some blue-green algae are used as bio fertilisers of their ______.
Glomus is a ______.
Why are blue green algae not popular as biofertilisers?
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
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?
Endomycorrhizae grow in ______ of higher plants.
Which cyanobacterium lives in association with the water fern Azolla and is widely used in paddy fields?
Which of the following is NOT a primary benefit of using biofertilizers in agriculture?
Which organisms are classified as nitrogen-fixing microbes that convert atmospheric nitrogen into usable forms?
What is the Greek etymological origin of the term 'mycorrhiza'?
Which biofertilizer component is most effective for enhancing phosphorus and mineral absorption while providing pathogen protection?
