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प्रश्न
What are 'biofertilizers'? Explain them with suitable examples.
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उत्तर
Biofertilizers: The biofertilizers are nitrogen fixing microbes or fungi which enrich the soil with nutrients.
There are 3 major types of biofertilizers i.e. bacterial biofertilizers, cyanobacterial biofertilizers and fungal biofertilizers.
Examples of biofertilizers:
- Nitrogen-fixing symbiotic bacterial biofertilizer - Rhizobium in root nodule of leguminous plants.
- Nitrogen-fixing symbiotic cyanobacterial biofertilizers - Anabaena azollae in Azolla.
- Nitrogen-fixing non-symbiotic cyanobacterial biofertilizers - Nostoc, Anabaena.
- Mycorrhizal Fungal biofertilizer - Ectotrophic mycorrhiza and Endotrophic mycorrhiza - VAM.
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संबंधित प्रश्न
Give the meaning of the Nif gene.
Explain the interrelationship between organic farming and biofertilizers, with the help of any three suitable examples.
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Define estuary.
Mycorrhiza forms symbiotic association with ____________ of higher plants.
VAM is a type of ______
Which of the following symbiotic microorganisms is nitrogen-fixing?
An organism used as a biofertiliser for raising soyabean crop prediction is:
Soil microorganisms mainly comprise:
Aspergillus niger is used to manufacture
