Effects of Different Cultivation Measures on Plant Type Tier Interaction Ratio and Sensory Quality of Yunyan 87 in High-altitude Tobacco-growing Areas

• LING Aifen, 
• LI Zheng, 
• SU Zhengyu, 
• CHEN Juan, 
• LONG Gang, 
• LI Feihong, 
• YE Xiefeng, 
• ZHANG Songtao