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The Effects of Basal Fertilizers on Content Changes of Main Nutrient Elements, Nitrate Nitrogen and Ammonium Nitrogen in Leaves of Pear Trees
黄展飞 高季平 董筱昀 吴自然 韦军
Chinese Agricultural Science Bulletin . 2013, (7): 169 -172 .  DOI: 10.11924/j.issn.1000-6850.2012-3162