Based on data collected by random survey of soil moisture in loess hilly and gully region

the authors ana-lyzed the soil moisture dynamics of different land uses. The study showed that land uses resulted in the differencesof dynamic racteristics of soil moisture. The crop land and the apple-orchard land had the same dynamics varia-tion. With the process of time

soil moisture increased gradually and then fell. The lands withouthuman hus-bandry

such as forest

shrub and grass land had the different trend. The soil moisture reduced gradually with time. In rainy season

soil moisture appreciably increased

butivets extent was not markedly. At the same time

land uses also made the dynamic characteristics of soil moisture profile ifferent. The authors used standard devia-tion to separate the layer of the soil vertical moisture variation. The resultivendicated hat the active moisture layer of farm land was markedly shallow.Land uses of different types made the variation coefficients and their varietydifferent. Except for the layer

the variation trend of different layers is accordant. As a soilmoisture reduced gradually month by month. The expiation ofrainfall was impaired by vegetation transpiration andsoil evaporation.