tǔ

Earth, is the 32nd radical. The earth 土 that produces all things. The top line represents the surface, the lower line the rock or subsoil, and 丨 the upright, the things that it produces.

Compounds
土地 tǔdì – ground; soil; acres; land, territory
土豆 tǔdòu – potato,(Taiwan) peanut
土人 tǔrén – natives; aborigines

Learn more about 土 at Wikionary