Simulation and evaluation of forage height in alpine meadow grassland in headwaters of the Yellow River

• Jian-peng Yin, 
• Jin-long Gao, 
• Qi-sheng Feng, 
• Jing Ge, 
• Bao-ping Meng, 
• Shu-xia Yang, 
• Tian-gang Liang, 
• Xiao-ping Meng