Response of soil moisture to the age of alfalfa standing and subsequent spring wheat in the rainfed Loess Plateau

• CAI Xuemei, 
• LUO Zhuzhu, 
• LI Lingling, 
• NIU Yining, 
• CAI Liqun, 
• XIE Junhong, 
• ZHANG Yaoquan, 
• MA Xin, 
• PAN Zhandong