The study was carried out on the basis of a detailed scale in a 30 km² test aera by using all available site and layer data of main and mini pits with the grids of 30m by 30m or 50m by 50m.This paper describes the punctual and areal variability of the soils in the main test area by the result from;——Frequency distribution of attribute values from all the observations;——Variogram analyses of layer depth,colour,pH,available P,and K of all the topsoil samples from three subareas(Y.D.F);——Kriging iraterpolation and construction of isoline maps for the attributes of subarea Y.All the studywork was performed on a GIS system supported by a microcomputer and the softwares ARC/INFO,IDRISI,dBASE and GEOEAS.