This paper apprehensive with the stabilization of sub grade dirt using deferent types of nearby available materials such as rice husk ash (RHA). Sugar cane ash (SCBA) and cow dung ash (CDA). RHA, SCBA and CDA were mixed in 0%, 2.5%, 5%, 7.5%, 10% and 12.5%. As intermediate plastic clay that reduces dryness and increases the optimum moisture content after stabilization. The trend of CBR and UCS increases and decreases, indicating a peak point showing an optimal ash content (7.5). CBR, UCS and CBR. We can easily protect our environment and we can design of economic roads.