Question: asking about the vermicompost preparation method
Answer: suggestion=
materials for preparation of vermicompost

any types of biodegradable wastes-

1. crop residues 
2. weed biomass 
3. vegetable waste 
4. leaf litter
5. hotel refuse
6. waste from agro-industries
7. biodegradable portion of urban and rural wastes

vermicompost production methodology

i) selection of suitable earthworm
ii) selection of site for vermicompost production

iii) containers for vermicompost production
v) worm food 
vi) selection for vermicompost production
vii) putting the waste in the container
viii) watering the vermibed
ix) harvesting vermicompost