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中文
Soil Nutrients Situation and Changes of County Medium-low Yield in the North China Plain
刘奎胜 董若征 刘志坤 霍艳改 陈丽丽
Chinese Agricultural Science Bulletin . 2013, (
21
): 92 -97 . DOI: 10.11924/j.issn.1000-6850.2013-0231
