Effects of Urea-nitrogen Level on Nutritional Growth and Physiological Characteristics of Flue-cured Tobacco Seedlings in the Floating System
XI Xiang-yin, CHEN Yi-yin, LIU Guo-shun, SHI Xiang-dong
ACTA AGRICULTURAE BOREALI-SINICA . 2008, (1): 128 -132 .  DOI: 10.7668/hbnxb.2008.01.028