Effect of Planting Density on the Stalk Characteristics and Mechanical Properties of Spring Maize in Hilly Region of Central Sichuan

• Fan JIANG, 
• Kaiwei XU, 
• Yueqiu HU, 
• Ling LONG, 
• Yuan ZHOU, 
• Taixiang MO, 
• Xianhua ZHONG, 
• Yuanxue CHEN