This study investigated the soil stabilization potential of ash obtained from the calcination of cattle bones and ash produced by burning rice husks on silty soil. After the cattle bones were first crushed and burned, they were calcined at 800°C for 1 hour, allowed to cool, ground, and sieved with a sieve with a 75-micrometer opening to obtain bone ash (BA). To get rice husk ash (RHA), rice husks were burned, ground, and sieved through a 75-micrometer aperture. A silt soil sample taken from a depth of 3-4 meters from the center of Sakarya Province in Yenigün District of Adapazarı district was used to stabilize it. RHA was added as ground and unground, 10% by weight of the samples, BA as 7% by weight of the samples, and BA and RHA as 7% BA + 10% RHA by weight of the samples. Unconfined compressive strength (UCS) tests were performed for this research. The results showed that the UCS value increased with the addition of BA and RHA as the curing time increased for 7% BA, 7%BA+10% RHA, and 10% ground RHA, while 10% unground RHA lost strength. Caused Therefore, 7%BA+10%RHA can be used to increase the UCS value of the soil. Instead of allowing bones to be disposed of in the environment, calcined bone ash should be encouraged to sustain people's livelihood on stabilized soils.