46 FIELD OPERATIONS OF THE BUREAU OF SOILS, 1916. 



improved. The average assessed value of farm land is given as 

 $58.09 an acre. Improved farms are held for $100 to $150 an acre. 



The soils of Porter County are composed of glacial, glacial-Like, 

 and alluvial materials. They are classed on the basis of origin, color, 

 topography and drainage, and other features, into soil series, the 

 series being separated into types on the basis of texture. Exclusive 

 of three miscellaneous classifications, 23 soil types, representing 11 

 series, are mapped in Porter County. 



The Miami series includes light-colored, forested, glacial soils with 

 yellow or yellowish-brown subsoils. They occupy level to rough 

 areas, and are used for corn, oats, wheat, hay, and dairying. 



The Crosby series, represented only by the silt loam type, differs 

 from the Miami chiefly in having a hght-gray subsurface layer, and 

 a mottled gray subsoil. 



The Carrington is a dark-colored, glacial, prairie soil. This series 

 is represented by the silt loam and a light phase of this type. Grain 

 production and general farming are practiced on the land of this type. 



The Clyde series occupies dark-colored, poorly drained depressions 

 within areas of the Miami, Crosby, and Carrington soils. Only one 

 type, the Clyde silty clay loam, is mapped. 



The fine sandy loam, loam, and silt loam of the Waukesha series 

 are recognized in Porter County. These are well-drained, dark- 

 colored, glacial-outwash soils, with brown subsoils and a sandy 

 substratum. 



The Plainfield series comprises the light-colored, timbered, better 

 drained part of the outwash and lake plain, where the soil is underlain 

 by sandy strata. The fine sand, fine sandy loam, and loam types 

 are mapped. 



The Lucas series resembles the Miami, but the topography is flat 

 and the material is derived from lacustrine deposits. It includes 

 two types, the loam and silt loam. 



Soils of the glacial-lake beds and drainage channels which have 

 rather deep, black to dark-drab soils and subsoils in which gray 

 predominates, are classed in the Maumee series. The substratum 

 usually consists of water-bearing sand. The Maumee loamy fine 

 sand, fine sandy loam, loam, and silty clay loam, are encountered 

 in Porter County. These usually are good, productive soils. 



The Homer series includes lake-bed soils which resemble the 

 Crosby soils in appearance. It is represented by a single type, 

 the Homer silt loam. 



The Newton series includes dark-brown, shallow soils with mottled 

 yellow, gray, and brown subsoils and a sandy substratum. It is 

 represented by three types, the fine sandy loam, loam, and silt loam, 

 which are naturally of low productiveness on account of their acidity. 



