soil N土壤氮soiln.土地；土壤；污物，粪便v.弄污Soil salt dynamics土壤盐分动态soil deformability土壤变形Soil and lime soil土和灰土拌和soil climatic zone土壤气候带Soil microbial DNA土壤微生物DNASoil clay particle土壤粘粒soil mechanic test土工试验soil fertility map土壤肥力图soil similar slope类土质边坡soil droughtstress干旱胁迫