曲靖烟区烟叶微量元素与土壤pH值关系研究
张芸萍, 郭山虎, 张锦涛, 解燕, 易克, 李强

The Relationship between Trace Elements in Tobacco Leaves and Soil pH in Qujing
Zhang Yunping, Guo Shanhu, Zhang Jintao, Xie Yan, Yi Ke, Li Qiang
图1 曲靖烟区土壤pH值正态分布图
Fig.1 Normal distribution of pH value of soil in Qujing tobacco area