半干旱区谷农采用化控间苗技术影响因素实证研究——以山西省长治市为例

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1000-7695|35|14|110-113

ISSN: 1000-7695

Source: 科技管理研究, Vol.35, Iss.14, 2015-01, pp. : 110-113

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Abstract