The Loess Plateau with degenerated soil and land use mosaics reveals a highly modified state controlled by human disturbance and topographical fluctuation.surface soil characteristics in this region are particularly sensitive to site variables and land use change.Taking Hengshan County as a case

the relationships of land types

soil properties and topography were analyzed at two different scales using CCA method.CCA showed that slope was a dominant factor influencing soil properties at both scales.Elevation and aspect was the second important features at county and catchment scale

respectively.ANOVA analysis showed that there existed significant differences in SOM

TN

TP

AN

AP and clay % between land uses.Further study using linear correlation compared the differences of effect of environmental variables on soil properties at two scales.The study indicated that soil variations are a result of comprehensive external effect of topography and land use

Also the effects exhibit different at various scales.