This book is an agricultural science book that systematically discusses the rational use and improvement of natural pastures and pastures. Based on grassland ecology and biology, the book systematically expounds the basic characteristics of grassland plants from multiple dimensions such as plant type, life cycle, reproduction method, seasonal development rhythm, and regenerative characteristics after cutting and grazing. On this basis, the types and distribution characteristics of pastures and pastures in various natural zones of the Soviet Union (tundra, forests, forest grasslands, semi-deserts, deserts and mountains), as well as various factors affecting their productivity and feed value, are introduced in detail. Focusing on the utilization and improvement of grassland, the book puts forward systematic technical measures from aspects such as fertilization, surface improvement, and fundamental improvement (i.e., establishing artificial grassland and sowing pastures), and deeply discusses scientific grazing systems (such as zoning rotation grazing, Timing grazing, etc.). The theoretical basis and practical plan. In addition, a special chapter is also devoted to the preservation and processing of forage such as hay preparation and silage. The book is both theoretical and practical, and is a comprehensive reference book for the fields of agricultural production, grassland science and pasture management.