SOILS — FERTILIZERS. 123 



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

 Station and issued June 7, 1915, deals with the soils of an area of 426,880 acres 

 in southwestern Missouri which in general comprises a broad plain. The topog- 

 raphy varies from smooth to hilly, although prevailingly it is gently rolling. The 

 county is drained by the Sac and the James Rivers and Pomme de Terre and 

 Wilson Creeks. 



The soils comprise residual upland soils derived mainly from cherty limestone, 

 and alluvial soils formed of material washed mainly from local upland soils. 

 The soils consist of silt with very little sand or clay and are well drained. " Like 

 the soil, the subsoil has a varying proportion of stone and gravel intimately 

 mixed with other constituents." Sixteen soil types, of nine series, are mapped, 

 of which the Crawford gravelly loam and silt loam are the predominating types. 



Soil survey of Nodaway County, Missouri, E. S. Vanatta, E. W. Knobel, 

 and W. I. Watkins [U. S. Dept. Agr., Advance Sheets Field Operations Bur. 

 Soils, 1913, pp. SI, fig. 1, map 1). — This survey, made in cooperation with the 

 Missouri Experiment Station and issued May 5, 1915, deals with, the soils of an 

 area of 502,560 acres in northwestern Missouri. The county comprises three 

 general physiographic divisions, namely, the uplands, which are the most exten- 

 sive ; the terraces ; and the bottom lands. It occupies a rolling prairie region and 

 the topography ranges from nearly level to rough and broken. The drainage is 

 mainly through the Nodaway, One Hundred and Two, and Platte rivers. 



The soils of the county fall into two general groups, the upland soils of glacial 

 and loessial origin, and the bottom-land soils. Ten soil types, of seven series, are 

 mapped, of which the Marshall silt loam is the most extensive. The Shelby loam 

 is second in extent and the Wabash silt loam, with a colluvial phase, third. " The 

 soils of Nodaway County are naturally strong and productive, and commercial 

 fertilizers are not extensively used." 



Soil survey of Perry County, Missouri, B. W. Tillman and C. E. Dear- 

 DOBFF (U. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 1913, pp. 

 34, fiff. 1, map 1). — This survey, made in cooperation with the INIissouri Experi- 

 ment Station and issued June 5, 1915, deals with the soils of an area of 295,680 

 acres in eastern Missouri which comprises upland and lowland, the former cov- 

 ering about seven-eighths of the total area of the county. The topography of the 

 upland varies from rolling to hilly, while the lowland is a generally smooth plain. 

 The coiuity is drained by tributaries to the Mississippi River, the uplands being 

 well drained. 



The upland soils are residual, largely from limestone, and the lowland soils 

 are alluvial derived from wash from the uplands. Twenty soil types, represent- 

 ing eleven series, are mapped, of which the Hagerstown silt loam and the Tilsit 

 silt loam are the predominating types. It is stated that in some places con- 

 siderable soil erosion has taken place, especially in areas of the Tilsit silt loam. 



Soil survey of Oneida County, New York, E. T. Maxon, M. E. Carr, and 

 E. H. Stevens (U. S. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 

 1913, pp. 59, fig. 1, maps 2). — This survey, made in cooperation with the New 

 York State College of Agriculture and issued May 22, 1915, deals with the soils 

 of an area of 784,640 acres in central New York which comprises two broad 

 upland regions separated by an old lake bed plain and glacial river channel. 

 The county is drained through Oneida Lake and the Black, Chenango, Susque- 

 hanna, Mohawk, and Hudson rivers. 



The soils range in texture from light sands and gravels to heavy clays and, 



with reference to origin, are divided into glacial, alluvial and lacustrine, residual, 



and cumulose soils. Fifty-eight soil types, of nineteen series, are recognized, of 



which the IMohawk and Ontario loams are the most extensive single types. It is 



18833°— No. 2—16 3 



