Research Article
Difference between Burley Tobacco and Flue-Cured Tobacco in Nitrate Accumulation and Chemical Regulation of Nitrate and TSNA Contents
Figure 5
Effects of chemical regulation on NNN, NAB, NAT, NNK, and total TSNA concentration in flue-cured tobacco. Error bars indicate standard error (). Symbols and indicate significant difference at 0.01 or 0.05, respectively.
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