Question
Name the categories of organisms used as biofertilisers with an example for each. How do they function in organic farming?
✓
Answer
- Bacteria: Azotobacter, Azospirillum, Rhizobium.
- Cyanobacteria: Nostoc, Anabaena, Oscillatoria.
Mycorrhizae:
- Glomus sp.
- They increase soil fertility by fixing atmospheric nitrogen (bacteria and cyanobacteria) and also by adding organic matter through photosynthesis (Cyanobacteria).
- Fungi in mycorrhizae help the plant to absorb phosphorus from the soil; they also provide resistance to root borne pathogens and tolerance to soil salinity and drought.
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