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The Effects of Humic Acid Under Different Water Levels on Poplar Growth and Soil Fertility
Zhang Jingmin1,2, Sang Maopeng3, Liu Chunsheng4, Xing Shangjun2
Chinese Agricultural Science Bulletin . 2013, (31): 64 -68 .  DOI: 10.11924/j.issn.1000-6850.2013-1338