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黄土高原旱地苹果园生草栽培研究进展
杜善保,张军科
Research Advances of Pasture-planting in Apple Orchard on semi-dry region of the Loess Plateau
中国农学通报 . 2014, (28): 81 -86 .  DOI: 10.11924/j.issn.1000-6850.2014-0959