Effects of sowing rate and row spacing on the seed yield and yield component traits of Onobrychis viciaefolia ‘Gansu’

• WU Huijuan, 
• ZHANG Rong, 
• GENG Xiaoli, 
• LI Deming, 
• FU Ping, 
• ZHOU Dongchang, 
• GAO Zhanqi, 
• LIU Qian