Types of Natural Grassland and Their Sustainable Utilization on Hilly and Gully Area of the Loess Plateau Primary Study on the Community Characterisfics of Vegetative Restoration in the Gully Area of the Hilly Loess Region Soil ecological stoichiometry under different vegetation area on loess hilly-gully region Dynamic monitoring on land cover in loess hilly and gully area by the methods of RS and GIS The character and dynamics with season of soil seed banks in abandoned croplands of loess gully region Effects of A rm en iaca sibirica-Astraga lus System on So il Physi-chem ica lProperties of the Hill and Gully Area on the Loess Pla teau 黄土高原丘陵沟壑区抗侵蚀植物叶表皮的生态适应性 Effects of Revegetation Types on the Soil Carbon, Nitrogen and Phosphorus of the Gully Areas in Hilly Loess Plateau, China Hydrologic responses to vegetation restoration and their driving forces in a catchment in the Loess hilly-gully area:a case study in the upper Beiluo River Coupling analysis of agro-ecolomic system in gully area of Loess Plateau in 1949-2008: A case study in Changwu County of Shaanxi Province. Soil and water erosion in its relation to slope field productivity in hilly gully areas of the Loess Plateau Water Storage, Sediment Reduction and Hydraulic Parameters as Affected by Vegetation on Earth Roads in the Gully Area of the Loess Tableland Selection of Microhabitat of Carabid Beetles (Coleoptera:Carabidae) in Different Ecological Restored Habitats in the Hilly and Gully Area of Loess Plateau, Ningxia, China