Effects of Different Biochar and Rapeseed Cake Ratios on the Soil Nutrient, Yield and Quality of Flue-cured Tobacco

• Qichang YU, 
• Qiang HU, 
• Baofeng JIN, 
• Bensheng LI, 
• Wei WU, 
• Pufan ZHENG, 
• Yonghong TANG, 
• Tianwei LI, 
• Hailun LIU, 
• Lixin ZHANG