@article{Zhang:146006,
      recid = {146006},
      author = {Zhang, Zhongya and Fu, Meichen and Meng, Yan and Guo,  Weibin},
      title = {The Dynamic Analysis of Agro-ecological Economic System on  the Basis of Emergy : A Case Study of Wu'an City in Hebei  Province},
      journal = {Asian Agricultural Research},
      address = {2013-02},
      number = {1812-2016-143733},
      pages = {5},
      year = {2013},
      abstract = {Using the method of emergy analysis, we analyze the input  and output of agro-ecological economic system, and select  five indicators (net emergy yield ratio, emergy investment  ratio, environmental loading ratio, emergy sustainability  index, and dominance of emergy yield system) for  assessment. The results show that the emergy input-output  in Wu'an City is in general on the rise; the emergy  investment ratio rises constantly, but the net emergy yield  ratio decreases, and the comparative advantage in the  prices of agricultural products is gradually lost. At the  same time, with increase in the non-renewable industrial  support emergy, the environmental pressures are also  mounting. In the future agricultural development, it is  necessary to pay more attention to the coordination between  agricultural development and ecological environment,  achieving sustainable development of agriculture.},
      url = {http://ageconsearch.umn.edu/record/146006},
      doi = {https://doi.org/10.22004/ag.econ.146006},
}