| Firstly, status of grain production in Henan Province is introduced. The rapid development of grain production has brought adequate food and clothing for Henan Province, has supported the development of industrial and agricultural production, has maintained the overall stability of the whole society, and has made great contribution to the national food security. Secondly, considering the small sample of research object, the uncertain poor information and the few restrictions on data distribution, the gray forecast is usually conducted by using time series data based on GM（1，1） Model. In order to ensure the high accuracy and the application in practical prediction, residual test is used. Thirdly, according to the grain productive data in Henan Province in... |
