Compost with GI of P80% is considered phytotoxic free and adequately matured
GI percentage was low in the first 16 h in DHAF, the reason is various intermediate compounds including a large amount of organic acids which are harmful to plants generated due to aerobic composting in this stage, the result is also reflected in Fig. 1 where EC and pH values were changed due to generation of phytotoxic intermediate compounds.