CLASSIFICATION BY THE BUREAU OF SOILS 83 



III. LIMESTONE VALLEYS AND UPLANDS PROVINCE 



This province includes two important topographic divisions 

 the limestone valleys and uplands. The limestone valleys are most 

 extensively developed within the Appalachian Mountain System, 

 and hesides these the Central Basin of Tennessee and the bluegrass 

 region of Kentucky. 



The uplands division includes a large area extending from 

 Alabama through Tennessee and Kentucky almost to the Ohio 

 River. The 0/ark region of southern Missouri, northern Arkansas, 

 northeastern Oklahoma, and southeastern Kansas is included. 



The principal soil series are as follows : 



Brooks Series. The soils are grayish brown to brown with 

 yellowish brown to slightly reddish brown clay subsoils. The soils 

 are derived from pure limestones, with an occasional admixture of 

 material from associated sandstone and shales. These soils have 

 good drainage. Wheat, corn, oats and apples do well. 



Clarksville Series. The soils are gray and the subsoils yellow 

 arid usually silty clay in texture and frequently underlain by a 

 reddish substratum. The depth to red material varies with the 

 topography, being deeper on the more level areas. The soils are 

 derived from a cherty limestone and occur over both level and un- 

 dulating uplands and rough and hilly country with steep slopes. 

 They arc adapted to tobacco, grass, small grains, corn, strawberries 

 and cantaloupes. Over live million acres have been mapped. 



Colbert Series. The surface soil is grayish to light brown and 

 the subsoil yellow and frequently plastic. The series is derived 

 from pure limestone or a limestone mixed with sandstone. The 

 topography is flat to undulating and drainage is generally poorly 

 established. With proper drainage wheat, oats, corn, and forage 

 crops can be grown with good results. 



Conestoga Series. These soils are yellowish brown to brown. 

 The subsoils are yellow greenish, occasionally mottled with gray* 

 and have a greasy feel. These soils are derived from schistose lime- 

 stone and calcareous shale or shaly limestone. They are adapted 

 to general farm crops. 



Decatur Series. The soils are characterized by a reddish 

 brown to deep red color and subsoils by an intensely red or blood 

 red color. They are derived mainly from pure limestone, with some 

 traces of chert, and are adapted to corn, small grains and forage 

 crops. They occur as nearly level to gently rolling valley lands. 



Hagerstown Series. The soils of this scries are prevailingly 



