The Applications of the Method of the Combination Forecasting in the Forecasting of Soybean Yield in Heilongjiang Reclamation Area

At first,the Logistic model of soybean yield is established in HeiLongjiang Jiusan area,by Newton method the parameters is solved,by analyzing the model we get more information.Second,stepwise regression model of soybean yield and meteorological factors is established,main meteorological factors that influence soybean yield in Jiusan area are found.In the end,by the combination forecasting and optimumal weight number combination forecasting model is established and precision is recreased.This is very important for guidance soybean produce.