Agricultural Physics discusses agricultural problems, some aspects of the environment, and water relations of plants from a physical point of view. This book provides particular attention to clarifying fundamental concepts and processes, such as the concept of the total potential of water and its components, which is of basic importance in understanding water movement in soil, plant, or atmosphere. Subject matters covered in this text are limited to topics to which physics has made a significant contribution, for instance, the experimental aspects of crop water use. This text is divided into eight chapters. Chapters 1 to 3 focus solely on the physical environment of agriculture, providing a background of the literature on the micrometeorology of crops and single plants. Some physical aspects of soils are elaborated in Chapters 4 and 6, while attributes of crop water use are covered in Chapters 5, 7, and 8. This publication is a good source for agriculturists, physiologists, and researchers conducting work on aspects of soils and plant water relations.