Figure 8

Spatial distribution of average actual yield of winter wheat from 1998 to 2008 in the main production regions of China (This figure was created by ArcGIS 9.3, http://www.esri.com/arcgis/).

Spatial distribution of average actual yield of winter wheat from 1998 to 2008 in the main production regions of China (This figure was created by ArcGIS 9.3, http://www.esri.com/arcgis/).