Abstract:The root system characteristics of plants are significant for plant species choice, spacing decision and management measures for agroforestry system. The objectives of this study are to understand root system characteristics of Tamarix ramosissima, Salix purpurea, Caragana korshinskii and Populus bolleana, which are extensively planted on the banks of terraces in arid Loess Plateau regions of northern China, and their competition for soil moisture. The study surveyed the characteristics of active roots by w...