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The reseach advance of the effect of humic acid to the soil and tobacco
刘茜1,马飞跃2,于建军1,卫盼盼1,叶贤文1,闫鼎
Chinese Agricultural Science Bulletin . 2010, (4): 132 -136 .  DOI: 10.11924/j.issn.1000-6850.2009-1875