Soil salinity had been considered the most important obstacle of agriculture production in Arid Region, Semi- Arid Region and Intensive Irrigated Area. The matter transferring (salt) and cumulating rule of soil under farming environment in Arid Region was the hotspot problem of soil science research in this years. The purpose of this project was to research orchard soil in Middle East Region (Qin'an County) of Gansu province in Arid Region of North-West of China, and to find out the main proble...