According to the analysis of 60 sampling points which located in Shanghuang small watershed in loess hilly area.Using geostatistics method analyzed spatial variability of soil organic carbon(SOC) contents.The results indicated thats the SOC contents decreased with the increase of soil depth and in different land use patterns,there existing significant differences.The SOC contents of surface 0-10 cm with 9.544 g/kg was obviously higher than that of 10-30 cm and 30-60 cm which were 7.10 g/kg and 4.63 g/kg res...