Effects of ridge mulching biochar on soil moisture and fertilizer, quality and yield of alfalfa in ridge-furrow rainwater harvesting

• WANG Xiaoyun, 
• WANG Qi, 
• ZHANG Dengkui, 
• ZHOU Xujiao, 
• ZHAO Wucheng, 
• ZHAO Xiaole, 
• LIU Qinglin, 
• CUI Xunzhen