Increased rainfall decreases nicotine levels in tobacco, impacting quality and production.
The amount of rainfall affects the quality of tobacco grown in Yunnan. More rain leads to lower levels of nicotine, total nitrogen, and Shmuck value in the tobacco plants. This is because increased rainfall reduces the amount of sunlight the plants receive, which affects the production of nicotine. The best range of rainfall for high-quality tobacco is between 152-210 mm. Areas with similar rainfall may be ideal for growing top-quality tobacco.