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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
Name the aquatic fern commonly used in paddy fields as a biofertilizer.
Define estuary.
Mycorrhiza is a______ which forms a symbiotic association with the underground parts like rhizomes and root of higher plants.
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 |
Blue green algae are used as bio fertilizers because they ____________.
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 ______.
Mycorrhiza does not help the host plant in ______.
Azolla is used as biofertiliser because it ______.
