Here are the definitions of vermicompost, green manure, and biofertilizers:
Vermicompost:
A type of compost made by using earthworms to break down organic matter like plant and animal waste, creating a nutrient-rich manure.
Green manure:
Manure produced by incorporating green plants into the soil, often by tilling them under to decompose and enrich the soil.
Biofertilizer:
Substances containing living microorganisms that promote plant growth by increasing the availability of nutrients in the soil or by fixing atmospheric nitrogen.
In more detail:
Vermicompost:
Earthworms accelerate the decomposition process, producing a compost with higher nutrient content than regular compost.
Green manure:
Leguminous plants are often used as green manure because they can fix nitrogen in the soil.
Biofertilizer:
Examples include blue-green algae (cyanobacteria) that fix nitrogen in rice paddies.