Soilan索伊兰soiln.土地；土壤；污物，粪便v.弄污soil cut high slope土质路堑高边坡soil-nail support土钉支护soil dressing spray客土喷播soil risk guideline土壤风险基准值soil identification土壤鉴定soil water transfer土壤水运动Soil sample quality土样质量soil erosion amount侵蚀量soil genetic layers土壤发生层soil-root complex土壤-根系复合体

1. The surface of the soil particle will have a negative charge.
   土粒表面会有负电荷。