Soil pH土壤pHsoiln.土地；土壤；污物，粪便v.弄污soil analytical chemistry土壤分析化学soil erosion model method模型法Soil Conservation Service水土保持局soil water sorption curve土壤吸水曲线soil P supplying capacity土壤供磷能力soil macro-invertebrate大型土壤动物soil structure properties土结构性Soil nutrition management土壤养分管理soil conservation measure土壤保持措施Soil water in vapor phase土壤汽相水