Study on Spatial Variability of Soil Nutrients and Texture Based on Geostatistics and GIS

It has far-reaching significance to various agricultural activities such as field fertilization and management to grasp the spatial variability rules of the soil nutrients comprehensively and thoroughly. This paper took Mapo Town of Weishan County as an example, to analyze the soil nutrients and the soil texture factor, namely to study the spatial distribution rules of the soil organic matter and available nutrients using traditional statistical methods and Semi-variance Function in Geostatistics and Common Kriging Interpolation. The results showed that the soil Organic matter and available K had certain correlation with the soil clay, which also emerged the gradually increased tendency from the northwest to the southeast in spatial distribution. Simultaneously, the soil alkali-hydrolyzed N content and available P content appeared well balanced in spatial because of the random factors probably.