The study looked at how different types of land use affect the amount of carbon stored in the soil in a hilly-gully watershed in China. They found that grasslands had the highest amount of carbon, followed by forests, terraces, sloped croplands, and dammed fields. The deeper you go into the soil, the less carbon there is. Overall, the watershed had a total of 113.16 million tons of carbon stored in the soil. The type of land use was the most important factor in determining how much carbon was in the soil. This information can help with soil and water conservation efforts in the area.