GIS application study on social effective coefficient of potential grain productivity in China

Based on the theory, model, and method about potential agricultural productivity, the social effective coefficient of potential grain productivity in China is studied in this paper supported by GIS and national agricultural database. At first, the social efficient factors were analyzed with their interactive functions and mechanism. Then, some methods and models related to social effective coefficient were worked out by taking three types and fourteen social efficient factors into account. On the basis of all the methods and models mentioned above, China´s national social effective coefficient for potential grain productivity are calculated by county unit. Finally, some conclusions were obtained by comprehensive analyzing