Spatial variability analysis of soil particle compositions and soil profile horizon in field

The spatial variability of soil particle compositions and soil profile horizons were analyzed in the 60 m55 m field. Conventional statistical analysis of 100 sampled points showed that coefficients of variation of those properties are medium. Semivariance model analysis for those soil parameters showed that their semivariance structures were spherical. These properties were correlated in different spatial ranges with different anisotropy. Base on Semivariogram and the trend analysis for those soil parameters, this paper compared interpolation method of Ordinary Kriging with different trend and anisotropy. The results showed that the Kriging methods considering trend and anisotropy were better than unconsidering trend and anisotropy. Finally, Ordinary Kriging with trend and anisotropy was applied to workout the contour map of soil particle compositions and soil profile horizons of unknown points, and their spatial distribution was analyzed.