increasing production through soil and water conservation Donahue, Roy Luther 1908- creator text Danville, Ill Interstate [1970] [3d ed.] monographic 683 p. illus. 24 cm. by Roy L. Donahue. Includes bibliographies. Soil science Agriculture (General) Soil management Crops and soils Water conservation S591 .D65 1970 631.4 67015835 UOEL 000 20150316104206.0 754937