Figure 9

Average yield gap (Yg) percentage from 1998 to 2008 in the main winter wheat production regions of China, (A) CERES-Wheat; (B) WheatGrow (This figure was created by ArcGIS 9.3, http://www.esri.com/arcgis/).

Average yield gap (Yg) percentage from 1998 to 2008 in the main winter wheat production regions of China, (A) CERES-Wheat; (B) WheatGrow (This figure was created by ArcGIS 9.3, http://www.esri.com/arcgis/).