The document discusses the six biodynamic compost preparations - 502 (Yarrow), 503 (Chamomile), 504 (Stinging Nettle), 505 (Oak Bark), 506 (Dandelion), and 507 (Valerian). It explains that these preparations, along with horn manure 500 and horn silica 501, are added to compost piles according to Rudolf Steiner's prescriptions. The document also mentions preparation 508 (Horsetail) which is fermented and sprayed on plants to prevent disease. It provides information on purchasing biodynamic preparations and attending an upcoming conference on the preparations.