The ecological environments have been reconstructed at Chinese Loess Plateau, but little attention is paid to development of dried earth layers which may be disadvantage for planting trees at loess areas. To delimit distribution of the dried earth layers and to evaluate it suitable for planting trees or not, moisture contents of soil under apple trees were determined. Our soil samples were collected by the lightweight manpower's drilling at intervals of 10cm near two villages (Qujiangchi and Wujiafen) at th...