Consider the following organisms
- Agaricus
- Nostoc
- Spirogyra
Which of the above is / are used as biofertilizer / biofertilizers?
- 1 and 2
- 2 only
- 2 and 3
- 3 only
Explanation
Only option 2 is correct
- Biofertilizers are a carrier medium rich in live microorganisms. When applied to seed, soil or living plants, it increases soil nutrients or makes them biologically available.
- Biofertilizers contain different types of fungi, root bacteria or other microorganisms. They form a mutually beneficial or symbiotic relationship with host plants as they grow in the soil.
- Nostoc is a genus of cyanobacteria (blue-green algae), that can fix atmospheric nitrogen. It is used as a biofertilizer for rice and other crops.
- Agaricus is a genus of mushrooms that are not used as biofertilizers, but as edible fungi or decomposers.
- Spirogyra is a genus of green algae that are not used as biofertilizers, but as indicators of water quality or sources of biofuel.
