AN ACRES USA PRIMER by Charles Walters and Walter Fenzau. Library of Congress card number: 79-50540. This book starts with “Pre-school” and advances through “Post-graduate”. A study of soils, plants, and animal nutrition.
The Secret Life of Plants by Peter Tompkins and Christopher Bird. ISBN 0-06-014326-6. “This book explores the world of plants and their relation to mankind…” (Fly leaf.)
Weeds, Guardians of the Soil by Joseph A. Cocannouer. The Devin-Adair Company. Copyright, 1950. Reprinted 1980.
Kervran, C. L.: Biological Transmutations; 1972,
Swan Publ. Co., NY; Michel Abehsera, translator.