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Research on the Soil pH Value based on the GIS with Kriging and Cokriging Method

SUN Yong-jian et al(Yangzhou Soil and Fertilizer Station,Yangzhou,Jiangsu 225002)  
In this study,the Semivariogram and Kriging methods were used to analyze the soil pH value,and then the elevation was made good use as auxiliary variable,which connected the soil pH with distribution of soil parent material.Semivariogram and cross-semivariogram of different elevation soil pH value were analyzed.As a result,compared with Kriging and Cokriging methods,it was shown that correlation inefficient between the predicted value and the observed value increased by 39.00%,which could be used to improve the soil pH value in Yizheng area.
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