422 EXPERIMENT STATION RECORD. [Vol.38 



wash, rough brokon land, and rough stony land. Approximately 90 per cent of 

 the .soils are of a loam or lighter texture. 



Soil survey of Bottineau County, N. Dak., W. B. Cobb, W. I. Watkins, A. T. 

 Strahorn, M. E. Stebbins, M. Thomas, and A. C. Anderson {U. S. Dept. Agr., 

 Adv. Sheets Field Oper. Bur. Soils, 1915, pp. 5-54, fiff- 1< '>n(ip 1). — This survey, 

 made in cooperation with the North Dakota Experiment Station, deals with the 

 soils of an area of 1.07.5,840 acres in north-central North Dakota. The county 

 lies in the glaciated portion of the Great Plains, the topography varying from 

 nearly level to gently undulating in the Prairie Plains region, to undulating 

 to hilly in the Turtle Mountains region. The drainage system is far from 

 complete but adequate to care for the run-off. 



The chemical composition of the soils of the county was determined by 

 numerous analyses of both surface and subsoil and is said to compare favorably 

 with that of soils of rich agricultural regions. " Like many of the other soils 

 of the Middle West they are lower in nitrogen and phosphorus than in the 

 other important elements when measured on the basis of standard crop de- 

 mands. They differ from the soils of the more humid regions in the Middle 

 West in that tliey contain much larger amounts of calcium and magnesium. 

 They also contain larger amounts of limestone or calcium carbonate. Owing to 

 defective drainage, small areas contain considerable amounts of soluble salts." 



The soils of the county are of glacial, or drift and alluvium origin. Eighteen 

 soil types and 7 type phases of 8 series, exclusive of peat and muck, are 

 mapped. Barnes loam, Barnes very fine sandy loam, and Barnes fine sandy 

 loam predominate, occupying 32.5, 22, and 11.6 per cent of the total area, re- 

 spectively. 



Soil survey of San Saba County, Tex., J. O. Veatch, R. F. Rogers, M. W. 

 Beck, and H. G. Lewis {U. S. Dept. Agr., Adv. Sheets Field Oper. Bur. Soils, 

 1916, pp. 5-67, fig. 1, map 1). — This survey deals with the soils of an area of 

 710.400 acres in central Texas lying in the High Plains region of the State, 

 and physiogi-aphically is a maturely dissected plateau. The topography of the 

 county varies from rolling or nearly level to deeply dissected, steep and precipi- 

 tous, with a general elevation ranging from about 1,200 to 1,900 ft. above sea 

 level. 



The soils of the county are mainly resulual in origin with about one-seventh 

 of the area derived from alluvial deposits. " Clay and clay loam soils pre- 

 dominate, with fine sandy loam next in extent. The greater part of the upland 

 is excessively stony and poorly adapte-d to farming. With the exception of some 

 of the sandy types, the soils are prevailingly dark in color at the surface 

 and moderately to highly calcareous. In addition to rough stony land, 34 soil 

 types, one represented by a phase, are mapped. These are classed with 14 

 soil series." 



Crawford stony clay, San Saba stony clay, and rough stony land constitute 

 15.5, 15.4, and 10.4 per cent of the area, respectively. 



Ei'osion of Kansas soils, R. I. Throckmorton {Bien. Rpt. Kans. Bd. Agr., 

 20 (1915-16), pp. 170-178, figs. 8). — Erosion of Kansas soils and methods of. 

 prevention are discussed, including the terrace method and the earth dam 

 method. 



Soil improvement, R. W. AlXlen [V. S. Dept. Agr., Bur. Plant Indus., Work 

 Umatilla Expt. Farm, 1915-16, pp. 8-12, figs. 2). — The soil fertility problems 

 on the Umatilla project near Hermiston, Oreg., are briefly stated, and yields of 

 clover in 1912, 1915, and 1916, with applications of nitrate of soda, muriate of 

 potash, phosphate rock, lime, tankage, blood meal, and stable manure are re- 

 ported. Tlie results are deemed inconclusive due to the uneven character of the 

 laud from grading for irrigation, but the greatest gain attributed to the fer- 



