Spatial heterogeneities of soil hydraulic characteristics and soil physical properties,and their relat ionship maybe differentat different scales Scaling analysis of soil hyd raulic characteristics(field capacity,wilting point and saturated hydraulic conductivity) and physical properties(particle size distributions,bulk density and organic carbon content) was carried out using the Detrended Fluctuation.Analysis(DFA) method Results showth at spatial variability analysis and scaling transformation(e.g.up-scaling) could be performed only with in a certain range of scales.The fluctuation pattern cannot be up scaled.when the scale is too small,because it can not get free from spatial in terdependency and hence reflects local scale features only.But when the scale is too large scale,it is hard to define dominant factors,including those with certa in characteristic length scale.For the sandy loam cinnam on soil in the study,the ranges of up scaling for field capacity,hydraulic conductivity,bulk density and organic carbon content are relatively large,being 55~155,50~125,50~125,and 50~135m,respectively,but small for sand,silt and clay con tents,being 50~85 m,indicating that it is essential to determine the range of up scaling before spatial scaling transformation is performed.