1916] SOILS — FERTILIZERS. 625 



HanceviUe sDt loam cover 27.3, 21.5, 11, and 14.3 per cent of the area, respec- 

 tively. 



Soil survey of Penmngton Covmty, Minnesota, W. G. Smith, N. M. Kiek, 

 and F. Ward (U. S. Dept. Agr., Advance Sheets Field Operations Bur. SoUs, 

 1914, PP- 28, pi. 1, fig. i).— This survey issued July 15, 1916, deals with the 

 soils of an area of 388,480 acres in northwestern Minnesota, the surface of which 

 is mainly level to undulating, with a general slope toward the southwest. 

 "The natural drainage of the county is for the most part poor and must be 

 assisted by artificial means." 



The soils of the county are of glacial origin. Including peat, 9 soil types of 

 3 series are mapped, of which the Fargo clay loam, Fargo loam, peat, and 

 Benoit loam cover 36.4, 17.3, 17.1, and 14.5 per cent of the area, respectively. 



The chemical composition of some Minnesota peat soils, DeF. Hungerford 

 {Jour. Artier. Peat Soc., 9 (1916), No. 2, pp. 7^^i ) .—Analyses made at the 

 Minnesota Experiment Station of 28 samples of peat, 10 of which were from the 

 muskeg type and 18 from the grass peat, are reported and discussed. 



The muslfeg peat, in general, contained a higher percentage of volatile matter 

 than the grass peat, this averaging 86.84 per cent in the former and 73.71 per 

 cent in the latter. The nitrogen content was higher in the grass than in the 

 musl^eg peats, the former containing an average of 1.874 per cent and the latter 

 of 2.569 per cent. The percentages of both phosphoric acid and potash were also 

 somewhat higher in the grass than in the muskeg peats. 



The gr-eatest difference in composition between the muskeg and the grass peat 

 was foimd in their lime content, although there was considerable variation in 

 the amount present in different samples of both types. The muskeg contained 

 on the average 1.237 per cent of lime, but different samples varied from 0.25 

 per cent to 5.97 per cent. The grass peat contained 3.35 per cent as an average, 

 and varied from 1.03 to 14.36 per cent. 



The analysis is taken to indicate that Minnesota peat soils resemble but do 

 not agree exactly in composition with those of European countries. 



The soils of Mississippi, W. N. Logan (Mississippi Sta. Tech. Bui. 7 (1916), 

 pp. 8Jf, pi. 1, figs. 15). — This is a revision and an enlargement of Technical 

 Bulletin 4 of the station (E. S. R., 29, p. 416), to which a brief discussion of the 

 general properties of soil and chapters on soil acidity and its correction and 

 on geological formations from which the soils were derived have been added. 



Soil survey of Dunklin County, Missouri, A. T. Sweet, B. W. Tillman, 

 H. H. Krusekopf, C. E. Deardorff, W. I. Watkins, and E. W. Knoble (U. 8. 

 Dept. Agr., Advance Sheets Field Operations Bur. Soils, 1914, PP- 47, pis. S, fig. 

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

 Station and issued August 8, 1916, deals with the soils of an area of 343,040 

 acres in southeastern Missouri which consists topographically of hill lands, 

 bench lands, including sandy ridges and glade lands, and low bottom lands 

 subject to overflow. 



" Nearly all parts of Dunklin County have been drained directly or at least 

 greatly benefited through the drainage of low-lying adjacent areas. . . . The 

 most important soils . . . are the sandy terrace or ' sand-ridge ' soils." 



Twenty-four soil types of nine series are mapped, of which the Sharkey clay 

 and the Lintonia fine sandy loam and fine sand cover 21.1, 15.2, and 14.8 per 

 cent of the area, respectively. 



Soil survey of Roger Mills County, Oklahoma, J. A. Kerr, J. H. Agee, and 

 E. C. Ha t.l (U. 8. Dept. Agr., Advance Sheets Field Operations Bur. Soils, 1914, 

 pp. S2, fig. 1, map 1). — This survey, issued July 11, 1916, deals with the soils 

 of an area of 726,400 acres in the Great Plains region in western Oklahoma. 



