Improving the quality stability of blend threshing plays a key role in building and developing of tobacco brand. In order to meet the different demand of leaf for Tobacco Company, one more scientifical and rational method to evaluate and classify tobacco quality should be chosen. This research analyzed the chemical composition of tobacco from 12 tobacco-producing areas in Yunan during 2009 to 2010, established the fingerprint and databas, and developed an appropriate method to classify and evaluate tobacco ...