soil Cr土壤铬soiln.土地；土壤；污物，粪便v.弄污soil conservation planning土壤保持规划soild state polymerization固相聚合soil specific surface area土壤比表面积Soil-applied Insecticide土壤处理杀虫剂soil-retaining structure挡土建筑物soil water characteristics土壤持水特征soil construction property土壤结构性soil mineral nitrogen test土壤无机氮测试soil nitrogenous pollutant土壤含氮污染物soil constitutive relation土体本构关系