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Effect on Maturity Leaf Tissue and the Content of Chlorophyl of
Flue-cured Tobacco under Different Nitrogen Forms
Xu Guanghui, Xiong Shuping, Wang Lu, Li Chunming, Ma Xinming
Chinese Agricultural Science Bulletin . 2008, (9): 233 -236 .  DOI: 10.11924/j.issn.1000-6850.2008-0173