The study looked at how different types of land use affect the distribution of nutrients in soil profiles. They analyzed soil samples from the Chaihe Basin and found that total nitrogen, phosphorus, and organic matter levels were influenced by the type of land use, with facility agriculture and traditional agriculture having the highest levels. Overall, the levels of these nutrients tended to decrease with depth in the soil, and this decline was more pronounced in facility and traditional agriculture areas. The researchers also noted that the season had a significant impact on soil nutrient content.