The need for change is clear, and Koepf provides a vast array of research data and results as well as many helpful details on animal feeding, crop rotation, diseases, pests, and fertilizing, proving that the biodynamic method is the alternative that can turn farming around. Biodynamics - the oldest alternative agricultural movement in the world - is based on the concept of the whole farm as a single organism. Its goals are protection and nurturing of soils, improvement of food quality, and organic integration of the farm into the environment. An essential reference book for farmers, students of agriculture, and everyone else concerned about the Earth's future.