The Keyline Plan by P.A. Yeomans is the foundational text that introduced the principles still used today in regenerative agriculture and land design.
Originally published in the mid-20th century, this work outlines a new way of thinking about land—one that centers on water, soil, and the natural shape of the landscape.
Yeomans’ key insight was that water is the primary driver of landscape health. By identifying specific points in the terrain—especially the “keypoint” in a valley—land managers can design systems that guide water more effectively across the land.