1918] SOILS- -FERTILIZERS. 215 



Including rough stony land, 35 soil types of 13 series are mapped, of which 

 the Lahontan silty clay loam, Olympic stony loam, and rough stony land cover 

 14.8, 13, and 12.7 per cent of the area, respectively. 



Soil survey of the Pasadena area, Cal., E. C. Eckmann and C. J. Zinn 

 ( U. S. Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 1915, pp. 56, pis. S, pj. 1, 

 map 1). — This survey, made in cooperation with the California Experiment 

 Station, deals with the soils of an area of 270,720 acres in southern California, 

 lying partly in San Bernardino County, but mainly in Los Angeles County, 

 The topography of the area varies from mountainous to low and rolling, with 

 elevations ranging from 225 ft. to 2,000 ft. above sea level. The region as a 

 whole is well drained. 



The soils of the area are derived from igneous and sedimentary formations 

 and from unconsolidated deposits. Twenty-three soil types of nine series are 

 mapped in addition to areas designated as rougli broken land, rough stony 

 land, and river-wash. Rough broken land occupies 16.3 per cent of the area, 

 Hanford fine sandy loam 12.3 per cent, and Hanford gravelly sandy loam 10.4 

 per cent. 



Soil survey of Crisp County, Ga., E. T. Maxon and D. D. Long {XJ. S. Dept. 

 Ayr., Adv. Sheets Field Opcr. Bur. Soils, 1916, pp. 24, fig. 1, map 1). — This sur- 

 vey, made in cooperation with the Georgia State College of Agriculture, deals 

 with the soils of an area of 173,440 acres in southwestern Georgia, including 

 three physiographic divisions, namely, the Altamaha Uplands, the Dougherty 

 Plain, and the " flatwoods." The topography varies from gently undulating to 

 rolling, and drainage is well established with the exception of a few low, flat, 

 poorly drained areas and lime sinks. 



The soils of the county are of Coastal Plain origin and are predominantly 

 sandy with sandy clay subsoils. Fourteen soil types of 11 .series are mapped in 

 addition to swamp. Norfolk sandy loam, Tifton sandy loam, and Plumraer 

 sandy loam occupy 31.7, 23.1, and 14.8 per cent of the area of the county, 

 respectively. 



Soil survey of Bentorr County, Ind., G. B. Jones and J. B. Buill (t/. S. 

 Dept. Agr., Adv. Sheets Field Opcr. Bur. Soils, 1916, pp. 20, fig. 1, map 1). — 

 This survey, made in cooperation with the Indiana Department of Geology, 

 deals with the soils of an area of 261,120 acres in northwestern Indiana. The 

 topography of the county varies from level to gently rolling with the highest 

 elevations in the north-central part. The natural drainage is described as 

 immature, with overflow or bottom lands of small extent. 



The soils of the county are derived from glacial drift and water-laid deposits 

 of glacial and more recent origin and are characteristic of the prairie regions 

 that extend westward through Illinois. In addition to muck, five soil types 

 each representative of one series are mapped, Brookston silt loam and Carring- 

 ton silt loam occupying 04.6 and 26.8 per cent of the total area of the county, 

 respectively. 



Soil survey of Scott County, Iowa, E. H. Stevens, E. H. Smies, and K. Espe 

 (V. S. Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 1915, pp. 43, fig. 1, map 

 1). — This survey, made in cooperation with the Iowa Experiment Station deals 

 with the soils of an area of 291,200 acres in eastern Iowa, the topography of 

 which is prevailingly rolling, the central and western parts of the coimty being 

 comparatively level. Surface drainage is said to be good throughout the 

 county. The area lies wholly within the glacial and loessial province. 



Including muck, 23 soil types of 13 series are mapped, of which the Muscatine 

 silt loam, the Memphis silt loam, and the Wabash silt loam cover 52.1, 15.1, 

 and 14.4 per cent of the area, respectively. 



