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Analysis on the Characteristic and Cause of orchard Soil Acidification in the Area of East Shandong Province
王见月 刘庆花 李俊良 金圣爱 袁永兵
Chinese Agricultural Science Bulletin . 2010, (16): 164 -169 .  DOI: 10.11924/j.issn.1000-6850.2010-0711