中国粮食主产区农业生态环境评价研究
易杏花, 何苗
Evaluation of agricultural environment in China’s major grain producing areas
YI Xing-hua, HE Miao
湖北农业科学 . 2021, (2): 161 -166 .  DOI: 10.14088/j.cnki.issn0439-8114.2021.02.034