Moisture distribution characteristics and time-space dynamics of the soil dry layer in alfalfa farmlands in arid regions of southern Ningxia
LIU Pei-song, JIA Zhi-kuan, LI Jun, WANG Jun-peng, LI Yong-peng, LIU Shi-xin
JOURNAL OF NATURAL RESOURCES . 2009, (4): 663 -673 .  DOI: 10.11849/zrzyxb.2009.04.012