Soil organic carbon (SOC) in karst areas is influenced by factors like soil type, land use, and rock exposure. A study in China's Guizhou Province found that these factors play a significant role in determining the distribution of SOC in a small karst watershed. The study used statistical modeling to analyze 2755 soil samples and discovered that soil family levels, land use, and rock exposure rates are the main predictors of SOC variability in the area. Soils in lower soil categories were better at reflecting SOC distribution. By considering these factors together, researchers were able to explain 56.60% of the variability in SOC levels in karst regions.