814 EXPERIMENT STATION RECORD. [Vol.40 



dredge silt loam and Colby silt loam, occupying G0.1 and 14.1 per cent of the 

 total area, respectively, predominate. 



Soil survey of Wayne County, Nebr.. B. W. Tii.lman and B. F. Hensel (U. g. 

 Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 1917, pp. 50, fig. 1, map 1). — This 

 survey, made in cooperation with the Nebraska Soil Survey, deals with the 

 soils of an area of 288,000 acres situated in the northeastern part of the 

 State. About three-fourths of the region comprises upland, one-eighth bottom 

 land, and the remainder terraces. The topography ranges from hilly and 

 rolling to gently undulating and smooth. Natural drainage is generally well 

 established except in depressions occurring mainly in the bottom lands. 



The soils of the county consist of loessial material derived by weathering 

 from the silt covering of the upland plain, drift soils derived from unconsoli- 

 dated glacial drift deposits, and sedimentary soils from the surrounding up- 

 land. Nine soil types representing 8 series are mapped. Marshall silt loam 

 and Wabash silt loam, occupying G7.9 and 1G.9 per cent of the total area, re- 

 spectively, predominate. 



Soil survey of Clearfield County, Pa.. R. A. Winston, R. W. McCltjbe, II. P. 

 Cooper, and D. C. Wimer (17. 8. l>ii>t. Agr., Adv. Sheets Field Oper. Bur. Sails, 

 1916, pp. 82, fig. 1, map 1). — This survey, made in cooperation with the Penn- 

 sylvania State College, deals with the soils of an area of 730,880 acres sit- 

 uated a little west of the geographical center of the State and entirely within 

 the Allegheny Plateau region. The topography of the county varies from roll- 

 ing to hilly, with elevations ranging from S50 to 2,280 ft. above sea level. 

 The region as a whole is said to have good natural drainage. 



The soils of the county include residual or upland soils derived from weather- 

 ing in place of shales and sandstones of the Coal Measures, and alluvial or 

 stream-bottom soils. In addition to rough stony land, 13 soil types represent- 

 ing six series arc mapped. Dekalb soils cover approximately 95 per cent of 

 the upland area of the county. Dekalb gravelly silt loam. Dekalb stony loam, 

 and Dekalb stony sandy loam predominate, occupying 29.2, 24.5, and 14 per 

 cent of the total area, respectively. 



Soil survey of Shelby County, Tenn., II. 11. Rknnett, R: T. Allen. L. V. 

 Davis, and C. R. Watkins, jr. (U. 8. Dept. Agr., Adv. Sheets Field Oper. Bur. 

 Soils, 1916. pp. S9, pis. 2, fig. 1, map 1). — This survey, made in cooperation with 

 the Tenm-ssce Geological Survey, deals with the soils of an area of 475,520 

 acres situated in the southwestern corner of the State. The greater part of 

 the county consists of undulating to rolling upland, although extensive areas 

 of nearly level first and second bottoms also occur. Natural drainage is gen- 

 erally well established in the upland region, while the bottom lands are for the 

 most part imperfectly drained. 



The upland soils of the county are of loessial origin and the bottom land 

 soils of alluvial origin. Thirteen soil types of 7 series are mapped. Memphis 

 silt loam, occupying 40.0 per cent of the total area, and Collins silt loam, oc- 

 cupying 17.3 per cent, are the prevailing upland and bottom land types, re- 

 spectively. 



Soil survey of Windsor County, Vt., J. A. KERB and O. B. .Tones {U. S. />. /</. 

 Agr.. Adv. Shots Field Oper. Bur. Soils, 1916, pp. 2!,, fig. 1, map I).— This sur- 

 vey deals with the soils of an area of 000.720 acres situated in the east -central 

 part of the State and bordered on the east by the Connecticut River. The 

 topography is hilly to mountainous with elevations ranging from 850 ft 

 above sea level along the Connecticut River to about 3,000 ft. in the western 

 part of the area. 



The soils of the county are chiefly of glacial origin. The upland soils have 

 been derived from unassorted glacial debris or till, the terrace or bench-land 



