While there have been numerous developments and advances in biodynamic agriculture methods since Ehrenfried Pfeiffer first introduced readers to its foundational principles and practices, the key elements remain. Even though this book was originally published in 1938, it remains a foundational text for biodynamic farmers and gardeners. Pfeiffer outlines the basic practices for successfully operating a biodynamic farm, including the principles behind each technique and practice. These methods are backed up by scientific research and data, as well as his own experience as a farmer and researcher, describing what works and what doesn't. Pfeiffer covers soil qualities, making compost, crop rotation, best planting practices, using biodynamic preparations and sprays, and much more -- all with the goal of growing the highest-quality foods by using sustainable methods, working with nature and caring for the earth. A classic resource for all biodynamic farmers and gardeners.