Wuqi County lies in the warm temperate zone and semi-arid area . Because of less precipitation , soil evaporation and
vegetation
transpiration, the soil water is seriously lossed and
dried soil layer appears in parts of
vegetation's ground. In order to systematically compare the characteristic of dried soil layer in different vegetation types, according to the local investigations and analysis of 0~9.0 m soil water of different vegetations, the following conclusions are drawn. Except the farm ground , other vegetations' grounds have dried soil layers of different degree. To the dried extent of layer , arbor ground is drier than shrub ground and shrub ground is drier than grass ground.At the time of investigation, it is found that there are temporary and perpetual dried soil layer in grass ground and the depth of perpetual dried soil layer is 4.0 m, and shrub ground has no temporary but perpetual dried soil layer and the depth of perpetual dried soil layer is 3.0~8.4 m, and almond ground has no temporary dried soil layer but the perpetual dried soil layer of pine is seriously dry and the perpetual dried soil layer depth of almond is over 8.0 m and the pine's is over 9.0 m. Precipitation determines the existence of temporary dried soil layer, so the temporary dried soil layer is related to the sampling time. This analysis of the dried soil layer in Wuqi will provides references for further study of dried soil layer and vegetation planting.