CLASSIFICATION BY THE BUREAU OF SOILS 87 



productive and constitute the great corn soils of the country. 

 Nearly four million acres have been mapped. 



Memphis Series. The Memphis series is characterized by the 

 light brown to yellowish brown color and silty texture of the sur- 

 face soils and by the slightly lighter colored and more compact 

 structure of the subsoils. They occur south of the latitude of St. 

 Louis and are most extensive in the loessial belt following the 

 east bank of the Mississippi river. Erosion has been active and 

 has resulted in a prevailingly rolling to broken topography. They 

 are well suited to corn, oats, peanuts, forage crops, and cotton. The 

 amount mapped is 2,000,000 acres. 



i Miami Series. The soils are brown, light brown or grayish 

 and are underlain by yellowish and brown heavier textured soils. 

 Mottlings of brown and light gray are present in the subsoils. Sur- 

 face drainage is usually good. The soils in the main are derived 

 from the weathering of glacial till composed largely of ground-up 

 limestone. Dairying is an important industry on the heavier types. 

 Nearly four million acres have been mapped. 



Mohawk Series. The Mohawk soils consist of dark colored 

 glacial material derived in part from dark colored calcareous shales 

 and limestones, but modified by admixture of glacial till from other 

 formations. The topography is rolling to hilly and they are con- 

 sidered good general farming soils. 



Ontario Series. These soils are brown to chocolate brown in 

 color, the subsoils being lighter and in many cases grading into 

 yellow. Both soil and subsoil usually contain scattered fragments 

 of limestone and are derived from glacial till of the drumlin region 

 of New York. The topography is undulating to hilly. 



Plymouth Series. These soils are derived from moderately 

 coarse glacial material largely from granites. The series includes 

 the morainal and till deposits found in southeastern Xcw England 

 and on Tx>ng Island. The surface soil is shallow and brown, under- 

 lain by a pale yellow subsoil. 



Putnam Series. This series includes dark gray to black soils 

 overlying impervious drab or brown subsoils of fine texture and close 

 structure. One of its principal characteristics is the presence of a 

 whitish silty layer between the soil and the subsoil. The soils 

 occupy level to gently undulating prairies and are derived from 

 loessial deposits. Drainage is poor because of the dense compact 

 structure of the subsoil. They are confined to Missouri. 



Richland Series. The Hichland series is characterized by a 



