Niche Dynamics of Dominant Species during the 30 Years Restoration Process of Natural Grassland in Yunwu Mountain Distribution Characteristics of labile organic carbon in soil aggregates in different stages of vegetation restoration of grassland in Yunwu Mountain Effects of Enclosure on the Community Characteristics of Stipa bungeana Grassland in Yunwu Mountain Variability of Soil Nutrient in Enclosed Grassland of Yunwu Mountain Allelopathic effect of extracts from Artemisia sacrorum leaf and stem on four dominant plants of enclosed grassland on Yunwu Mountain Responses of vegetation restoration to climate change during the past 30 years in enclosed grassland of Yunwu Mountain in semi-arid region of the Loess Plateau Floristic Study of Spermatophyte in Yunwu Mountain Natural Reserves of China Study on Water-Holding Capacity of the Top Soil of a Steppe Reserve in the Yunwu Mountains, Guyuan, Ningxia Hui Autonomous Region Distribution Characteristics of the Root System of the Stipa bungeana Trin. Community in Yunwu Mountain Distribution Characteristics of Soil Labile Organic Carbon of Different Grassland Communities in Yunwu Mountain Distribution of Soil Organic Carbon and Total Nitrogen of Grassland in Yunwu Mountain of Loess Plateau