In this study, various agriculture and industrial organic wastes were mixed with cow manure (BM) as main raw material. Cow manure , alone and in mixed with sugar cane bagasse (BG), date palm wastes (DW) and grape waste (GW) at the ratios of 3:1, 1:1, and 1:3 were used for culturing of the earthworm, Eisenia foetida, respectively. Total number, final biomass and final length of earthworms and resulting vermicomposts were analyzed for their properties and chemical after 70 d. Results showed that growth of the earthworms in terms of total number, final biomass and final length in BM mixed with GW at the ratio of 3:1 were significantly greater than in other mixture treatments probably due to the neutral pH condition. Mixture of cow manure and bagasse resulted in the highest rate of vermicompost production of 24.6 Kg/m-3. The mixture of BM and GW provides the best conditions for Eisenia foetida growing. BM mixed with GW produced the best results in terms of chemical composition of the resulting vermicompost. Results of this study showed that vermicomposting was an adequate process for degradation of sugar cane bagasse, grape waste and date fruit waste. These above-mentioned organic wastes can be mixed with cow dung for the production of quality vermicompost.
