Page:Tree Crops; A Permanent Agriculture (1929).pdf/339

 . 114. Top. Mr. Lawrence Lee's great invention—a water-holding terrace made on absolute contour with Martin grader. Trees, very small in picture, planted just below edge of ditch. They are growing admirably with no cultivation in an old worn field. It works. This is not mere theory. (Photo Lawrence Lee.)—. 115. Center. Terracing cottonfields, South Carolina. Water follows the gentle winding slope of the black lines. It would interfere with no machinery if rows of trees stood on the edge of these terraces. (Courtesy U. S. Dept. Agr.)—. 116. Bottom. Apple orchard planted on contour by M. B. Waite (U.S. Dept. Agr.), with irregular spacing of trees and short rows, but soil is saved though cultivated. (Photo J. Russell Smith.)