191!)] SOILS — FERTILIZERS. 813 



to wheat seedlings, showed 0.55S per cent of ferrous iron. The water soluble 

 salt content, however, was not very different from that of normal soil. 



Report on a reconnoissance of the soils, agriculture, and other resources 

 of the Kenai Peninsula region of Alaska. EL EL Bknnktt (' . gf. />« j,l. Agr., 

 Adv. Sheets Field Opcr. Bur. Soils, 1916, pp. 1^2, pis. S-i, maps 5). — This com- 

 prises a detailed report of a reconnoissance dealing primarily with the K<nai 

 Peninsula, but touching also on the Knik Arm strip, the Prince William Sound 

 region, and the Copper River delta, made during the summer of 1910 by a party 

 composed of representatives from the Forest Service and the Bureau of Soils, 

 for the purpose of studying the soils, agriculture, and other resources and the 

 general economic conditions of the region. Considerable meteorological data 

 are presented, together with descriptive material relating to the geography, 

 physiography, geology, regional drainage, flora, forest fires, settlement and 

 general development, soils, agriculture, furs, game, birds and animals other 

 than game, insects, fish, and recreational and scenic features of the area. 



The soils of the peninsula are said to have been derived from glacial and 

 residual, glacial outwash, alluvial, marine sedimentry, wind-blown, and coma- 

 tose materials. The results of mechanical and chemical analyses of some of 

 the more important soil types of the region are presented in tabular form, 

 together with descriptions of the different types. 



Detailed soil maps have been prepared of the Knik Arm strip, and of a 

 3-mile strip along Cook Inlet from East Foreland to the head of Kachemak 

 Bay, the two areas comprising 39.GS0 and 54,400 acres, respectively. In the 

 Knik Arm region various phases of Knik loam occupy 80.8 per cent of the 

 total area, while in the Cook Inlet region Knik loam and muskeg occupy 47.3 

 and 25 per cent of the total area, respectively. 



See also a previous report (E. S. R., 34, p. 209.) 



Soil survey of Covington County, Miss., E. M. Jones and A. T. Sweet (U. S. 

 Dept. Agr., Adv. Sheets Field Opcr. Bur. Soils, 1917, pp. 40, pi- 1, fig- 1, »"ip 

 1). — This survey, made in cooperation with the Mississippi Geological Survey, 

 deals with the soils of an area of 262,400 acres situated in the south-central 

 part of the State and lying entirely within the Gulf Coastal Plain. The topog- 

 raphy of the region is generally rolling, and natural drainage is well estab- 

 lished in most parts of the area. 



The upland soils of the county are of residual origin, being derived from 

 beds of sand, sandy clay, and clay, while the terrace and first-bottom soils are 

 of alluvial origin. Twenty soil types representing 13 series are mapped. 

 Huston fine sandy loam, occupying 37. G per cent of the total area, and Orange- 

 burg fine sandy loam, occupying 15.4 per cent, are the prevailing types. 



Soil survey of Phelps County, Nebr., B. W. Tillman and B. F. Hi 

 (U. S. Dept. Agr., Adv. Sheets Field Opcr. Bur. Soils, I'.Ul, pp. 1,2, fig. 1. map 

 1). — This survey, made in cooperation with the Nebraska Soil Survey, deals 

 with the soils of an area of 344,320 acres situated in the south-central part of 

 the State. Approximately four-fifths of the county comprises a broad upland 

 with a level to gently undulating topography known as the loess plain. The 

 upland also includes a small area of dunes and an inextenslve canyon having 

 a rough topography. The lowlands border the Platte River and are flat except 

 for low ridges and deserted stream channels. The elevations range from 

 2.1S0 to 2,500 ft. above sea level. Natural drainage Is said to be adequate 

 except in certain depressions in the loess plain. 



The soils of the county consist of loessial material, unconsolidated deposits 

 mostly sands, eolian material composed chiefly of dunesand, and alluvial de- 

 posits. In addition to dunesand, 11 soil types of 8 series are mapped. Hoi- 



