soil Cr土壤铬soiln.土地；土壤；污物，粪便v.弄污Soil pollution probability污染概率soiland water conservation防治soil compaction resistance土壤压实阻力soil shrinkage coefficient土壤收缩系数soil bio-characteristics土壤生物特性soil moisture infiltration土壤水分入渗soil and water running off水土流失soil classification system土壤分类系统Soil labile organic carbon土壤活性有机碳soil diamagnetic substance土壤反磁质