土层

土层	tǔ céng	layer of soil / ground level
土	Tǔ	Tu (ethnic group) / surname Tu
土	tǔ	earth / dust / clay / local / indigenous / crude opium / unsophisticated / one of the eight categories of ancient musical instruments 八音
层	céng	to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers