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With the introduction of GPS and GIS, the spatial variability of soil properties was measured and analyzed using traditional statistics method and geo-statistics. 63 sampling points were measured on a 50 m grid in the soil surface (0~20 cm) of a 13.3 hectare winter-wheat field and were positioned by the GPS receiver. The results show that all soil nutrients are normal distribution and represent moderate...
As a type of nonlinear dynamic parallelism system, artificial neutral network has a capacity of identifying complex causal relationships between variables, such as those between the winter wheat yield and the soil spatial distribution nutrients, including water content, organic matter, total nitrogen, alkali-hydrolysable nitrogen, rapidly available phosphorus and potassium. By training 50 tested soil...
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