The study looked at how organic carbon in forest soils changes with altitude in the Lushan Mountains of China. Researchers found that on the northern slope, organic carbon content increased with altitude and was affected by soil density and pH. On the southern slope, organic carbon content didn't change much with altitude but decreased with soil depth. Overall, soil organic carbon density ranged from 7.07 to 10.34 kg/m² on the northern slope and 6.03 to 12.89 kg/m² on the southern slope. This suggests that changes in vegetation due to human activities can impact the distribution of organic carbon in forest soils.