Biodynamic Farming and Gardening: Renewal and Preservation of Soil Fertility"Every agricultural enterprise is a self contained, biological unit." Ehrenfried Pfeiffer There have been numerous developments and advancements in biodynamic agricultural methods since Ehrenfried Pfeiffer introduced North Americans to the foundational principles and practices of biodynamics, the basics of which continue to be used today. Thus, although Biodynamic Farming and Gardening was first published in 1938, it remains a foundational text for