This encyclopedia is founded on the study of Rudolf Steiner’s Agriculture Course. With a multitude of citations and references. It is the collection of all available informations about the Preparations, wordwide and from 1924 on. It is also the result of decades of experience in Switzerland and outside. With a lot of practical tips, scientific explications, technical instructions and bibliographical references.
with 280 photos in black-and-white and in colors, charts and drawings.
With a preface from Dr. Uli Johannes König.
