-Dr. Ehrenfried Pfeiffer (1899–1961)
Dr. Ehrenfried Pfeiffer was born in Munich, Germany. He worked closely with Rudolf Steiner to test and document many of the effects of biodynamic practices. He was manager and director of an 800-acre experimental biodynamic farm in Loverendale, Holland. This farm was set up to carry out some of the agricultural studies of the Goetheanum laboratory. Pfeiffer was awarded a doctorate for his groundbreaking theory of Sensitive Crystallization Processes as a blood test for detecting cancer. In 1940, he immigrated to the U.S., where he pioneered biodynamic agriculture and helped establish the Biodynamic Farming & Gardening Association. He died in Spring Valley, New York.