京津冀地区氮磷钾肥施用量与种植业产值的关联性分析

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1008-3456|volume|6|29-36

ISSN: 1008-3456

Source: 华中农业大学学报:社会科学版, Vol.volume, Iss.6, 2015-01, pp. : 29-36

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Abstract