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结果表明高打脚叶与二次打顶后，烟叶质量提高，等级结构优化。
The result indicated that: cutting bottom leaves to higher place and double tip pruning leaves can improve quality and optimize configuration of tobacco leaves.
高打脚叶不仅能提高烟叶产量、产值，而且能提高烟叶等级结构与质量。
Cutting bottom leaves to higher place not only can improve yield and income but also can optimize configuration and quality of tobacco leaves.
该研究的初步数据表明，去除底部4片叶消除脚叶等级，去除底部8片叶消除脚叶和下部叶等级。
Preliminary data from this study indicates that removal of the bottom four leaves eliminates priming grades and the removal of the bottom eight leaves eliminates priming and lug grades.
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