Biodynamic Compound Preparation – also called Barrel Compost or BC.  Made from all of the Biodynamic Compost Preparations and used when you do not have enough biodynamic compost for your gardens, lawns & fields. BC brings all of the benefits and characteristics of the six Biodynamic Compost Preparations to the soil. Please note that BC should not be used in place of your fertility program (compost and other amendments) but rather to enhance it.