Question: asking about preparation of vermicompost
Answer: recommended to farmer that
1. materials for preparation of vermicompost
any types of biodegradable wastes-
crop residues 
weed biomass 
vegetable waste 
leaf litter
hotel refuse
waste from agro-industries
biodegradable portion of urban and rural wastes
2.  vermiculture bed
vermiculture bed or worm bed (3 cm) can be prepared by placing after saw dust or husk or coir waste or sugarcane trash in the bottom of tub / container. a layer of fine sand (3 cm) should be spread over the culture bed followed by a layer of garden soil (3 cm).  all layers must be moistened with water.
3. vermiworm
eisenia foetida, perinonyx ecavatus