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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.
APPEARS IN
संबंधित प्रश्न
Give the meaning of the Nif gene.
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?
How does the activity of each one of the following help in organic farming?
Cyanobacteria
Which one of the following is a free-living bacterial biofertilizer?
identify the plants with which Anabaena, is associated.
Which of the following statements are CORRECT regarding Anabaena and Frankia?
Which one of the following is not a biofertilizer?
Soil microorganisms mainly comprise:
Aspergillus niger is used to manufacture
Which of following organisms cannot fix nitrogen?
- Azotobacter
- Oscillatoria
- Anabaena
- Volvoх
- Nostoc
Choose the correct answer from the options given below:
