Application of the Grey System Theory in the Forest Land Forecasting

In this paper,based on grey system theory,the general GM(1,1) forecasting model for the forest land forecasting of one city in Liaoning province was set up and it has been proof-tested in model precision.The max comparative difference was 0.53%.Verified by use of 2003's date of the forest land,it has been proved that the model was effective in practice and the comparative difference was 3.65%,less than 5%.In allusion to the character of the grey system and the city's forest land,some modified suggestions have been put forward that the better forecasting area should be equal to the forecasting area based on GM(1,1)plus the forest land area from zoology-withdrawing-infield area of the country programming every year.