United States text Washington, D.C.] U.S. Dept. of Commerce, Bureau of the Census For sale by Supt. of Docs., U.S. G.P.O. [1986] monographic xvii, 85, 4 p. : ill. ; 28 cm. "Prepared for U.S. Department of Agriculture, Economic Research Service." "Issued June 1986." Irrigation farming Irrigation Farms Ranches Agricultural surveys 338 FOR 1986 A072 Or.