Using the comprehensive comparative advantage index method,three indicators,including efficiency advantage index,the scale advantages index and aggregated advantage index,were constructed to determine the comparative advantage of rice in 122 counties of Hunan Province from 2000 to 2011.According to the forming reasons of comprehensive comparative advantage indices,the comprehensive comparative advantage of rice in each county(city/ district) was divided into three types,efficiency type,scale type and balance type.Then,the corresponding strateg...