According to the whole region 3414exeperment, using the common model of the fertilizer effect function, the second success rate of the fertilizer effect function were statistically analyzed and studied on different models of selection of the fertilizer effect function in the main crop; research on the effects of coefficient and fertilizer rate in the building process of the fertilizer effect functions after adding blank output (N0P0K0).As well as studies on methods to establish of the regional fertil...