Compost: Micro-organisms, mostly bacteria, but also yeasts and fungi, in soil break down (or decompose) the organic matter and convert it to useful product known as compost . Compost supplies nutrients that are essential for plant growth and development.
Vermicompost: It is the product of composting by utilizing various species of worms, especially earthworms to create a heterogeneous mixture of decomposing vegetable or food waste and vermicast. Vermicast, also known as worm castings, worm humus or worm manure, is the end-product of the breakdown of organic matter by the earthworm.
Fertilizer
1. They are inorganic salts.
2. They are manufactured in factories.
3. They do not add any humus to soil.
4. They are rich in plant nutrients like nitrogen, phosphorus, and potassium.
Manure
1. They are natural substances made from decomposed residue of plants and animal waste.
2. They are prepared in fields.
3. They add humus to soil.
4. They have a relatively poor content of plant nutrients.
Regards