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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?
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उत्तर
- Two microbes that can enrich the soil with nitrogen are Nostoc and Anabaena.
- Legumes are very good for enriching the soil. They do not require any enrichment, as in their case nitrogen is fixed symbiotically. They have nodules on their roots with bacteria called rhizobium, whose function is to fix the atmospheric nitrogen directly into the soil. These nodules contain all the necessary components for nitrogen fixation.
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संबंधित प्रश्न
How does the application of cyanobacteria help improve agricultural output?
Define biofertilizers. Give two types of fungal biofertilizers
Identify free-living bacterial bio-fertilizer.
______ associated with plants like Azolla and Cycas can be used as a 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 |
Which of the following is one of the basic elements considered in green revolution?
From the following pairs of microbes, identify the pair that has both the microbes that can be used as Biofertilizers.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
Which of the following is/are symbiotic nitrogen fixing microbe?
Which of the following statements are CORRECT regarding Anabaena and Frankia?
Anabaena forms symbiotic relationship coralloid roots of ______.
The biological agent which is used to kill or check proliferation of disease causing agents is called ____________.
Which of the following symbiotic microorganisms is nitrogen-fixing?
Soil microorganisms mainly comprise:
Mycorrhiza does not help the host plant in ______.
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Anabaena
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 |
Aspergillus niger is used to manufacture
