PROBLEM TO BE SOLVED: To provide a method capable of effectively reducing a contamination level of the soil 1 by effectively removing the soil surface layer part 11 contaminated by the contaminating substances having substantially strong adsorptivity to the soil particles such as radioactive nuclear species cesium 137 falling down from the air.SOLUTION: Plants 2 such creeping plants are grown in the soil 1 the surface layer part of which is contaminated by the contaminating substances such as the radioactive nuclear species cesium 137 or cesium 134. After growing, the plants 2 are removed from the soil 1 while cutting the roots thereof along with the soil surface layer part 11 to which the roots 22 of the plants 2 entangle in high density.COPYRIGHT: (C)2013,JPO&INPIT【課題】放射性核種セシウム137のような、土壌粒子への吸着力が著しく強い汚染物質が大気中から降下することによって汚染された土壌表層部11を効率良く取り除いて、土壌1の汚染レベルを有効に低減する方法を提供する。【解決手段】放射性核種セシウム137又はセシウム134のような汚染物質により表層部が汚染された土壌1に匍匐性植物などの植物2を栽培する。生育後、この植物2を、この植物2の根22が高密度で絡みついた土壌表層部11と共に土壌1から根切りして剥ぎ取る。【選択図】図7
