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प्रश्न
How does the activity of each one of the following help in organic farming?
Cyanobacteria
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
Find out the role of microbes in the following:
Soil
Define biofertilizers. Give two types of fungal biofertilizers
Identify free-living bacterial bio-fertilizer.
Which one of the following is a free-living bacterial biofertilizer?
Which of the following is one of the basic elements considered in green revolution?
In plant breeding, biofortification is a method ____________.
Soil microorganisms mainly comprise:
Farmers are often suggested to use the following organism in their crop land so as to improve the soil fertility. Explain.
Rhizobium
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 |
- Give an example of a genus of fungi that forms mycorhizal association with plants.
- How does the plant derive benefits from this association?
