Effects of Biochar Combined with Soil Improver on Acid Soil Characteristics and Flue-cured Tobacco Quality

• WANG Haiyang, 
• XIA Hao, 
• LI Hongxia, 
• LIAO Xiaopeng, 
• HU Ronghua, 
• JI Xiaoming, 
• YANG Xiaopeng, 
• LI Huilan