FORESTRY SURVEY 



239 



marize, general correspondence between soil types and 

 forest types is to be made ont, more in detail upon the 

 upland, bnt soil types and vegetation types are both more 

 closely dependent upon topography than upon each other. 



Geographic SuBomsioxs of the Area 



The area of Cumberland county is only 350 square 

 miles, but in it can be distinguished five geographic subdi- 

 visions. They are shown in Map II, which was made from 

 the soil survey map as a base. The subdivisions are as fol- 

 lows : 



1. 

 2. 



3. 

 4. 

 5. 



Map 2. Geographic Subdivisions of Cumberlaud County. 

 For description see text. 



Upland prairie of the western border of the county. 



Inter-stream upland prairies. 



Forest area of the western creeks. 



Forest area of the Embarrass and the eastern creeks. 



Morainal outwash plains of the northern border. 



These will be taken up in order. 



1. The upland prairie of the western border is consid- 

 ered as slightly dilferent from the inter-stream areas be- 

 cause of dilferences in floristic composition and in vegeta- 

 tional history. Being so much more extensive than the 

 inter-stream prairies, it has been less encroached upon in 

 the slow spread of forests from the valleys. In parts of the 

 western upland border which are distant from the forest 



