Authors : Song Lili, Chinese Academy of Agricultural Sciences, Beijing (China), Institute of Agricultural Resources and Regional Planning; Wang Xiudong, Chinese Academy of Agricultural Sciences, Beijing (China), Institute of Agricultural Economics and Development
Authors : Li Jizhu, Jilin Agricultural University, Changchun (China), College of Agronomy; Hu Yang, Jilin Agricultural University, Changchun (China), College of Agronomy; Zhang Huanxin, Jilin Agricultural University, Changchun (China), College of Agronomy