6 years ago

Excessive nitrogen leads to high nicotine levels in tobacco leaves.

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Nitrogen Transformation in Soil and its Effects on Nicotine Content of Upper Flue-cured Tobacco Leaves
Weiqun Liu, Guo Qunzhao, Zhang Fu-suo, Chao Feng-chun

Paper Summary

The study looked at how nitrogen levels in soil affect the nicotine content of tobacco leaves. They found that adding nitrogen fertilizer increased inorganic nitrogen in the top soil layer, but not in the deeper layer. Too much nitrogen later in the growing stage led to high nicotine levels in the upper leaves.

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