Woody Landscape Plants Selection in Urban Accessory Greenlands of Branches in Semi-Arid Areas——An Example of Shendong Mining Area Effects of organic fertilization on soil nutrient, enzyme activity and crop productivity in semi-arid areas of southern Ningxia Analysis of the Relationships of Net Photosynthesis Rates among Eight Poplar Clones in Semi-arid Area, Western Part of Liaoning Province The relationship between grassland ecosystem and soil water in arid and semi-arid areas: a review Evaluation of adaptability of conservation tillage in Loess Plateau semi-arid areas A Review on the Studies of Bryophyte Ecology in Arid and Semi-arid Areas