"Astounding farming skill of the ancient Peruvians, who were among the most industrious and highly organized people in history." This is the subtitle of this article documenting a 1915 expedition to Peru to investigate the old Incan and pre-Incan farming techniques and culture. Their terracing systems are unparalleled.
An historical survey of worldwide soil erosion. Many remarkable photos showing the ruins of what were once fertile, productive places that are now desert or semi-desert that can barely support struggling people—the remnants of what once were flourishing civilizations.
This broad, world-wide survey was primarily done from a biodynamic point of view and with considerable acknowledgment for the contribution of Sir Albert Howard.