SOILS FERTILIZERS. 



121 



1, map 1). — This survey, made in cooperation witli the Indiana Department of 

 Geology, was issued May 13, 1915. It deals with the soils of an area of 

 2G1,120 acres in central Indiana. The topography of the northern and west- 

 ern parts of the county is undulating to very gently rolling, while in the cen- 

 tral and southern parts the relief is stronger. The natural drainage of the 

 northern and northeastern parts is poor, but that of the southern part is good. 

 Thoughout the county the prevailing surface material is a silt or silty clay 

 ranging from 2 to 3 ft. in depth and overlying a deep deposit of bowlder clay. 

 Twelve soil types, of four series, are mapped in the county, the Miami silt loam 

 covering 69.6 per cent of the area. 



Soil survey of Montgomery County, Kansas, F. V. Emerson and C. S. 

 Waldkop (U. S. Dept. Agr., Adran<;e Sheets Field Operations Bur. Soils, 1913, 

 pp. 36, pi. 1, figs. 2, map 1). — This survey, made in cooperation with the Kansas 

 College and Station and issued April 17, 1915, deals with the soils of an area 

 of 412,160 acres in southeastern Kansas. In general, the eastern two-thirds of 

 the county is prairie and the western third hilly. Except for some of the river 

 soils, the surface drainage is generally good. 



The soils of the county include types of residual, colluvial, and alluvial 

 origin. Twenty-one soil types, of eight series, are mapped, of which the Oswego 

 silt loam, a residual type, is the most extensive single type. The Bates series 

 of residual soils, including very fine sandy loam, loam, stony loam, shale loam, 

 gravelly loam, and very fine sand, is, however, the most extensive series. The 

 Verdigris alluvial soils are said to be comparatively light, well drained, and 

 probably the most productive soils in the county. It is stated that nearly all 

 of the soils need humus and that a number of the soils, especially the upland 

 types, are acid. Underdrainage for the large areas of heavy, poorly drained 

 soils, and the iise of systematic rotations, including some leguminous crop, for 

 all soils are also suggested as beneficial measures. 



The soils of Kentucky, S. D. A\t:kitt (Kentucky Sta. Bui. 103 {1015), pp. 

 720-164, pi. D- — This bulletin gives brief statements of the fundamental facts 

 in regard to soils, plant food, and fertility, together with explanations of terms 

 and methods of analysis used, and gives tables of analyses of samples of 388 

 representative soils of the 10 soil areas of Kentucky, together with a general 

 discussion of fertility requirements. 



The 10 soil areas of the State cover approximately 41,000 square miles. The 

 following table gives average analyses of the soils of each of the areas : 



Avci-agc analyses of Kentucky surface soils to a depth of 7 in. 



Area. 



Trenton, 1,200 square miles 



Cincinnatian, 7,900 square miles 



Silurian and Devonian, 1,800 square miles 



Waverl y, 4,400 square miles 



St. Louis, 6,000 square miles 



Chester, 2,000 square miles 



Western coal field, 4,500 square miles 



Eastern coal field, western part, 2,000 square miles. . . 

 Eastern coal field, central and eastern part, 8,000 



square miles 



Quarternary, 2,350 square miles 



River alluvium, 750 square miles 



Avail- 

 able 1 

 potas- 

 siiun. 



Percent. 

 0.0160 

 .0180 

 .0110 

 .0170 

 .0160 

 .0110 

 .0140 

 .0130 



.0180 

 .0150 

 .0195 



1 Soluble in N/5 nitric acid. 



