No. 2, September, 1920] SOIL SCIENCE 301 



2303. Jones, E. M., and A. T. Sweet. Soil survey of Covington County, Mississippi. 

 Advance sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 1917:5-39. 1 fig., 1 map {col- 

 ored). 1919. — For character of report see Hot. Absts. .">, Entry 2310. 



2304. Kru.sekopf, II. II., J. H. Aoee, and R. II. Hall. Soil survey of Callaway County, 

 Missouri. Advance sheets, Field Operations Bur. Soils, V. S. Dept. Agric. 1916:5-37. 1 fig., 

 1 map (colored). 1919. — For character of report see Bot. Absts. 5, Entry 2316. 



2305. Maxson, E. T., C. E. Deardorff, \\ . A. RocKIE and J. M. S.vyder. Soil survey 

 of Burke County, Georgia. Advance sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 

 1917:. r > 29. 1 fig., 1 map (colored). 1919.— For character of report see Bot. Absts. 5, Entry 

 2316\ 



2306. Mei i.hs, A. II., and T. H. Benton. Soil survey of Henry County, Iowa. Advance 

 sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 1917: 5-31. / fig., 1 map (colored). 

 1919. — For character of report see Bot. Absts. 5, Entry 2316. 



2307. Meyer, A. H., and B. H. Hendrickson. Soil survey of St. Martin Parish, Louisi- 

 ana. Advance sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 1917: 5-31. 1 fig., 1 

 map (colored). 1919. — For character of report see Bot. Absts. 5, Entry 2316. 



2308. Nelson, J. W., C. J. Zinn, and others. Soil survey of the Los Angeles Area, Cali- 

 fornia. Advance sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 1916: 5-76. S pi., 1 

 fig., 1 map (colored). 1919. — For character of report see Bot. Absts. 5, Entry 2316. 



2309. Rogehs, R. F., and W. G. Smith. Soil survey of Calhoun County, Michigan. 

 Advance sheets, Field Operations Bur. Soils, TJ. S. Dept. Agric. 1916 : 5-52. 1 fig. , 2 maps (col- 

 ored). 1919. — For character of report see Bot. Absts. 5, Entry 2316. 



2310. Rogers, R. F., and L. A. Wolfanger. Soil survey of Chase County, Nebraska. 

 Advance sheets, Field Operations Bur. Soils, U. S. Dept. Agric. 1917: 5-64. / fig., 1 map 

 (colored). 1919.— For character of report see Bot. Absts. 5, Entry 2316. 



2311. Smiks, E. H. Soil survey of Canadian County, Oklahoma. Advance sheets, Field 

 Operations Bur. Soils, U. S. Dept. Agric. 1917: 5-58. 1 fig., 1 map (colored). 1919. — Canadian 

 County, Oklahoma, is situated in the Great Plains region and consists of undulating to rolling 

 uplands with a ruling elevation of 1375 feet above sea level. The area is thoroughly drained 

 by four of the parallel streams that cross western Oklahoma in a southeastward direction. — 

 Grain farming is the important industry of the county with the raising and fattening of live- 

 stock as the coordinate industry. The principal farm crops are corn, oats, wheat, grain sor- 

 ghums, alfalfa, hay and cotton. Fruit growing is developed to some extent in part of the 

 county. Railroad facilities are good. — The mean annual rainfall is about 32 inches. The 

 highest rainfall occurs during the growing season while the winter months are comparatively 

 dry. The lowest annual rainfall recorded is 17.27 inches. The mean annual temperature is 

 58.6°F. Hot,, dry winds from the south sometimes cause considerable damage to crops. — 

 The upland soils of the county are classed into two general divisions, residual prairie soils 

 and soils largely of wind blown origin. The residual prairie soils are derived from the under- 

 lying red sandstones and shales, which form a part of the Permian Red Beds. They are 

 usually calcareous. The wind blown soils are composed for the most part of material blown 

 up over the uplands from the near-by alluvial flood plains. The alluvial bottom-land soils 

 are divided into two general divisions, terrace or second-bottom soils, and the more recent 

 alluvial or first-bottom soils. — The principal nat ive grasses of the upland soils consisted chiefly 

 of blue stem, buffalo grass, grama, mesquite and a variety of bunch grasses. Blue stem dis- 

 appears after being pastured for a few years and the principal growth is mesquite. Timber 

 belts lie along most of the drainage ways in the more rolling sections. The trees are chiefly 

 elm, hackberry, black walnut, cottonwood and oak. Red cedar was once abundant. — The 

 farms in the vicinity of the larger streams and on the prairie soils are fairly well improved. — 

 F. B. Howe. 



