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旱地果园土壤有机质对氮素含量的影响
张述强, 姚志龙
Effects of Soil Organic Matter on Nitrogen Content in Dryland Orchard
Zhang Shuqiang, Yao Zhilong
中国农学通报 . 2021, (17): 45 -50 .  DOI: 10.11924/j.issn.1000-6850.casb2020-0539