highly significantp < 0.001
Regarding soil properties, soil As content exhibited a highly significant positive correlation with CEC ( p < 0.001), and significant positive correlations with gravel (volume percentage), clay, calcium carbonate (CaCO 3 ), water-soluble nitrogen (WSN), distance to habitation (DH), silt, and TEB ( p < 0.01 or p < 0.05).