ATTRA Biodynamic Guide
Check out this guide published by the National Center for Appropriate Technology on biodynamic agricultural principles and compost preparation techniques. Biodynamic agriculture was one the first ecologically-minded farming systems that emerged in response to the widespread use of commercial fertilizers. However, largely due to its emphasis on spirituality, it is not often studied or utilized by farmers. Despite this, it has made important contributions to organic agriculture and its history warrants special attention.