The study looked at soil carbon levels in Laifeng county, China. Most carbon was found at altitudes of 500-800 meters, with less at higher and lower altitudes. The soil had lower carbon density than the national average. Carbon density increased with altitude in deeper soil layers but decreased in the top layer. Soil type had a small impact on carbon density in the top layer but a significant impact in deeper layers. Human farming practices also affected carbon density, with less impact in hilly areas and more in dry and paddy fields. Carbon density was most influenced by temperature and precipitation in hilly areas, less in dry fields, and least in paddy fields.