You can refer to the earth on the ground as dirt, especially when it is dusty.
泥土They all sit on the dirt in the dappled shade of a tree. 他们都坐在斑驳的树荫下的地上。
A dirt road or track is made from hard earth. A dirt floor is made from earth without any cement, stone, or wood laid on it.
泥土的I drove along the dirt road. 我行驶在一条土路上。