1. High-resolution mapping of soil texture at various depths in Anhui Province, China.
- Author
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Lu, Lijiang and Wang, Jianping
- Abstract
Understanding the spatial distribution of soil texture is essential for healthy plant growth, soil fertility optimization, and sustainable soil management practices. In this study, the spatial distribution of clay, silt, and sand content at a 30-meter resolution in Anhui Province, China, were predicted at various depths (0–5, 5–15, 15–30, 30–60, 60–100, and 100–200 cm). A total of 413 soil profiles were used to estimate soil texture. Additionally, a dataset of environmental parameters was employed for modeling. The Random Forest (RF) model was utilized for three-dimensional soil texture prediction. Uncertainty was assessed by utilizing the lower (5%) and upper (95%) limits of the prediction interval. The results showed that using the RF method could produce highly accurate and detailed predicted soil texture maps for Anhui Province, displaying the three-dimensional spatial variations of soil texture. Additionally, the prediction interval coverage probability (PICP) index results, derived from uncertainty maps, indicated the high prediction accuracy of the methods utilized in this study. The findings also revealed that the main controlling factors of the soil texture pattern in Anhui Province are standh, tempSeason, NDVI, and slope. Elevation significantly affects soil texture by influencing temperature. Slope plays an important role by regulating erosion processes, while vegetation cover is key in controlling erosion and sedimentation. Overall, this study highlights that advanced methods for estimating soil properties represent a significant advancement in soil modeling, leading toward more effective soil resource management. [ABSTRACT FROM AUTHOR]
- Published
- 2025
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