Soil pH土壤pHsoiln.土地；土壤；污物，粪便v.弄污soil frictional resistance土抗力soil conservation district土壤保持区soil moisture distribution土壤水分布soil-nonlinear structure地基-非线性结构soil loss evaluation index土壤侵蚀评价指数soil contained some cement水泥土Soil mechanical resistance土壤机械阻力soil- nailing protection土钉支护Soilless-scale-cutting无土扦插soil surface heating agent土面增温剂