Keyline Design is a land management technique developed by P.A. Yeomans in the 1950s. It focuses on the natural contours of the land to optimize water flow and improve soil health. By creating a network of keylines, or specific lines on the landscape, this method helps to direct water to where it is most needed, promoting sustainable agriculture and reducing erosion. The approach emphasizes the importance of integrating water management with agricultural practices. By understanding the landscape's natural features, farmers can enhance crop yields, conserve water, and restore degraded land. Keyline Design is widely used in permaculture and regenerative farming systems.