Availability and contributions of soil phosphorus to forage production of seeded alfalfa in semiarid Loess Plateau Analysis of cultivated land utilization change in Loess Hilly and Gully regions based on dissipative structure theory Simulation of Interception Quantity by Black Locust Canopy in Loess Hilly and Gully Region Effects of landscape patterns on soil and water loss in the hilly area of loess plateau in China: landscape-level and comparison at multiscale Analysis on economical effect of project of returning farmland to forest and grassland in the Loess Hilly and Gully Area: a case study in Ansai Country Soil heat and response of vegetation growth in the loess hilly and gully region: a case study of Yangou Catchment Seasonal variations in leaf C, N, and P stoichiometry of typical plants in the Yangou watershed in the loess hilly gully region Effects of landscape pattern on watershed soil erosion and sediment delivery in hilly and gully region of the Loess Plateau of China: patch class-level Soil water environment and vegetation growth in the hilly and gully region of the Loess Plateau: a case study of Yangou Catchment