The study looked at soil organic carbon in a peak-forest plain in Southwest China. Soil samples were collected from different land types, and the amount of organic carbon was measured. Results showed that organic carbon levels varied between land types and decreased with soil depth. Paddy land had the highest range of organic carbon values. The topsoil was found to be crucial for storing organic carbon. Compared to a less disturbed area, the peak-forest plain had lower organic carbon levels, likely due to human activities. This suggests that land use and farming practices can impact soil organic carbon storage. Understanding how organic carbon is distributed in the soil is important for guiding agriculture and land management practices.