Page:Tree Crops; A Permanent Agriculture (1929).pdf/177

 . 58. Top. Near Seville, Spain. At right, goat pasture scrubby with oaks and other brush. Trees allowed to grow up at left and yield acorns in the wheatfield—Fic. 59. Center. Augusta, Ga. Mr. R. O. Lombard's plan of acorn-yielding oaks (for pig-feed) as successors to the fence post when the posts are gone.—. 60. Bottom. Two-hundred-foot gullies (plow work) on slopes of Sierra Nevada Mountains near Granada, Spain, a half mile from Fig. 61. (Photos J. Russell Smith.)