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प्रश्न
How does the activity of each one of the following help in organic farming?
Cyanobacteria
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उत्तर
Cyanobacteria are free-living or symbiotic blue-green algae which are capable of converting atmospheric molecular nitrogen into the soluble form like nitrites or nitrates.
This is called nitrogen fixation.
The cyanobacteria carry out this process when free-living in the soil or plant roots and enrich the nitrogen content of the soil acting as a natural fertilizer.
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संबंधित प्रश्न
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?
Define estuary.
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 |
Which of the following is one of the basic elements considered in green revolution?
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 ____________.
What is the primary outcome of the Legume–Rhizobium symbiosis in terms of soil enrichment?
Which cyanobacterium lives in association with the water fern Azolla and is widely used in paddy fields?
Which biofertilizer system is particularly significant for rice cultivation in paddy fields?
Which biofertilizer component is most effective for enhancing phosphorus and mineral absorption while providing pathogen protection?
