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Study on Soil Physical-chemical Properties and Enzyme Activities in Apple Orchards with Different Planting Years
杜静静 张永清 马大龙 张希云 陈轶楠 李育鹏
Chinese Agricultural Science Bulletin . 2013, (34): 90 -95 .  DOI: 10.11924/j.issn.1000-6850.2013-0920