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Effect of Long-term Fertilization on Humic Acid and Fulvic Acid Content in Black Soil of Different Organic Matter Levels
倪浩为,张晴,侯萌,徐欣,陈一民,隋跃宇,焦晓光
Chinese Agricultural Science Bulletin . 2017, (23): 38 -41 .  DOI: 10.11924/j.issn.1000-6850.casb17050133