XYLEM CAVITATION AND EMBOLIZATION IN WOODY PLANTS Effects of Soil Water Conditions on Wheat Xylem Vulnerability and Leaf Ultrasound Acoustic Emission Several Controversial Viewpoints in Studying the Cavitation of Xylem Vessels The highly effecitive methods for extracting EGCG from fresh tea Application of ultrasound on plant physiology The hydraulic acclimation of old and dwarf Populus simonii trees growing on sandy soil in northern Shaanxi Province, China