This document summarizes a research paper that studied the properties of black cotton soil treated with stone dust and sisal fiber. Black cotton soil has issues with high swelling and shrinkage. The study aimed to determine the effect of varying percentages of stone dust and sisal fiber, both individually and combined, on the properties of the soil. The results showed that the unsoaked and soaked California Bearing Ratio (CBR) values of the treated soil increased compared to the natural soil, and increased further with higher percentages of stone dust and sisal fiber. The paper concluded that mixing stone dust and sisal fiber into the black cotton soil can improve its engineering properties.