This paper uses DEA and Malmquist index to analyze the changes in arable land productivity in Kaifeng City during 2003- 2012.The results show that during 2003-
Fishery is an essential part of economic and ecological civilization construction of Poyang Lake Ecological Economic Zone. Taking fishery development and ecolog
Leisure agriculture in foreign countries has a long history of over 100 years,and China’s leisure agriculture started in the 1980 s.With the earlier reform and