soilbag土工袋soiln.土地；土壤；污物，粪便v.弄污soil and rock mechanics岩土力学soil-less cultivation无土栽培soil chemistry property土壤化学性质soil supply coefficient土壤供给系数soil moisture threshold土壤水分阈值soil compacting machine土壤夯实机soil weater evaporation土壤水蒸发soil thermal convection土壤热对流soil displacement field土体位移场soil-sticked seedling带土小苗