The Look of Our Land: An Airphoto Atlas of the Rural United States : The Far West, Parti 2-5U.S. Department of Agriculture, Economic Research Service, 1970 - 48 pagine |
Parole e frasi comuni
30 inches 7,200 square miles agriculture alluvial fans Alluvial soils ASCS Average annual precipitation-12 Average annual tempera Average annual temperature Average freeze-free period Brown Podzolic Brunizems Calcisols Calif California Coast Range Cascade Mountains CDF3 Chernozems Chestnut soils Climate coastal plains creasing with elevation cropland CVL 18FF CVL 7FF Dairy distributed through fall Douglas-fir drier Elevation and Topography farms and ranches Federal Government feet flood plains Forage Forest gently sloping grass grazed Ground water Ground-water supplies higher mountains Humic Gley soils Idaho Index Sheet Land Resource Area Lithosols loess low in summer lumbering major crop moderate rainfall mountain slopes Noncalcic Brown soils Pacific Coast Range percent plateaus principal soils Reddish-Brown Lateritic soils Regosols Sea level SIMON BAKER Snake River Solonchak Sols Bruns Acides SPECIALTY CROP REGION square miles Land steep steeply sloping streamflow summers are dry terraces volcanic ash