Cow Dung, partially decomposed crop residues, leaf litter and Earthworms Benefits of Vermicompost: It is a good quality Organic Manure, also called as blackgold Improves the soil physical conditions such as soil structure, aeration etc. Increases soil microbial load. Helps in betterseed germination and plant growth. It is rich in earthworm castings and earthworm eggs. It has appreciable amounts of plant nutrient elements(NPK and other 10 nutrient elements) and also Plant growth promoting substances.