22 EXPERIMENT STATION EECOKD. [Vol.37 



the county. "There Is some deficiency on the broad plateau level In the 

 northeastern part where drainage ways have not yet become thoroughly 

 established." 



The soils of the county are of glacial, loesslal, and alluvial origin. " The 

 greater part of the county is covered with glacial drift over which lies a thin 

 mantle of loess, and these formations give rise to the upland soils. The 

 alluvial soils include both stream-bottom and terrace or second-bottom types." 

 Fourteen soil types of nine series are mapped, of which the Memphis silt loam 

 and an eroded phase cover 42.4 per cent of the area and the Grundy silt loam 

 36.7 per cent. 



Soil survey of Washington County, Nebraska, L. V. DAv^s and H. C. Mobt- 

 LOCK {V. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 1915. pp. 

 SS, fig. 1, map 1). — This survey, made in cooperation with the Nebraska Soil 

 Survey, deals with the soils of an area of 243,200 acres on the central eastern 

 border of Nebraska. " Physiographically, the county is an old loessial plain, 

 now dissected by dendritic drainage systems. It may be di>ided into two 

 main topographic divisions, the uplands and the lowlands. Most of the up- 

 land consists of undulating to broken land developed by erosion from the old 

 loessial plain. The lowlands consist mainly of first bottoms or alluvial flood 

 plains, but also include flat to undulating terraces or second bottoms. . . . 

 The surface drainage is everywhere good." 



The soils are of glacial, loesslal, and alluvial origin. Including river wash, 

 14 soil tjpes of seven series are mapped, of which the Marshall silt loam 

 covers 63.5 per cent of the area. 



Soil survey of Davidson County, North Carolina, R. B. Hardison and L. L. 

 Bbinkley (U. S. Dept. Ayi ., Advance Sheets Field Operations Bur. Soils, 1915, 

 pp. 55, fig. 1, map 1). — This survey, made in cooperation with the North Caro- 

 lina Department of Agriculture, deals with the soils of an area of 370,560 

 acres in west-central North Carolina, the topography of which is prevailingly 

 rolling to steeply rolling or badly broken, becoming semimountainous in the 

 southern part. " Many small perennial streams, spring branche.><, and inter- 

 mittent streams make up a well-developed drainage system, which reaches all 

 parts of the county. All the lirst-bottoni land alung the tflreams Is subject to 

 overflows of short duration." 



The soils of the area are of residual and alluvial origin. Twenty-two soil 

 types of 11 series are mapped, of which the Cecil sandy loam, Georgevllle silt 

 loam. Alamance silt loam, and Durham sandy loam cover 18.8, 14.4, 9.5, and 

 8.1 per cent of the area, respectively. 



Soil survey of Lewis and Gilmer Counties, West Virginia, W. J. Latimkr 

 {TJ. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils. 1915, pp. S-i. fig. 

 1, map 1). — This survey, made In cooperation with the West Virginia Geological 

 Survey, deals with the soils of an area of 469.120 acres in central West Vir- 

 ginia which lie.s wholly within the Appalachian Mountain and Plateau Province. 

 The topography in general is steep and broken. Many small streams and 

 spring branches reach well back Into the uplands and furnish all sections of 

 the area with good drainage outlets. Owing to the steep topography, the run- 

 off is rapid and drainage is excessive. 



The soils of the area are divided naturally Into upland or residual soils, 

 terrace, and bottom soils. Including rough stony land, nine soil types of six 

 series are mapped, of which the Dekalb silt loam, Meigs clay loam, and Upshur 

 sUty clay loam cover 36.1, 29.7, and 22.6 per cent of the area, re.*;pectively. 



Arable soils, A. T. Charron (Rp(. Min. Agr. Prov. Quebec, 1916. pp. 10^- 

 112). — Analyses of 26 samples of arable soils representative of different parts 



