Effects of Fertilization and Mixed Sowing on Soil Nutrients and Pasture Yield of Degraded Grassland in Songnen Plain Journal title: Bulletin of Soil and Water Conservation Authors: Yufeng Fang, Zhiwei Cao, Hongsheng Sun, Qin Han, Dunliang Yan, Baoyang Wen, Xiubin Ren Subject(s): Environmental Sciences, Agricultural Science, Soil Sciences