Biodynamics is a specialist form of Organic Agriculture. Biodynamics was first proposed by Dr Rudolf Steiner in his ‘Agriculture Course’ presented over ten days in the summer of 1924 at Koberwitz (now Kobierzyce, Poland). The course was a response to the incursion of synthetic fertilizers into farming practices post WW1. Rudolf Steiner proposed that the farm is an organism, he suggested various botanical and mineral preparations for application to compost, fields and crops, and he drew attention to attending to favourable times for planting and harvesting. At Koberwitz he founded the ‘Experimental Circle for Anthroposophic Farming and Gardening’ to test and develop  his ideas for his biological style of farming (in contrast to using synthetic chemicals). Dr Ehrenfried Pfeiffer oversaw some of the earliest biodynamics research from the Natural Science Section of the Goetheanum, Dornach, Switzerland. Ehrenfried Pfeiffer published his book ‘Bio-dynamic Farming and Gardening’ in 1938. Biodynamics is now practiced in 250,000 hectares across 55 countries.