Study on suitable seeding rate of green manure for multiple cropping rape after wheat under different planting patterns in Yellow River pumping irrigation region of Inner Mongolia

• LIU Chen, 
• WANG Weini, 
• LIAO Shipeng, 
• REN Tao, 
• GUO Chen, 
• XU Yuanyuan, 
• YU Dao-hai, 
• LIU Junmei, 
• ZHANG Haoqiang, 
• SUN Xia, 
• LU Jianwei