Study on plant moisture stress of Sophora viciifolia in the Loess Area North of Shaanxi province Growth of characteristics of Sophora viciifolia population in the hilly and gully region of Loess Plateau Studies on the Alkaloid Constituents in the Seeds of Sophora viciifolia Hance Studies on the Flavone Constituents in the Seeds of Sophora vicii foli a Hance Comparison of Genetic Diversity of Irradiated Sophora viciifolia Using ISSR and RAPD Markers