The Bulletin 

 average chemical analysis of cecil stony loam. 



17 



Surface\„ r 



Subsoil/2°^="-\ 



Vola- 

 tile 

 matter 



Nitro- 

 gen 



.063 

 .02 



Phos- 

 phoric 

 acid 



.04 

 .076 



Potash 



1.505 

 1.626 



Lime 

 CaO 



.121 

 .254 



Pounds of Total Plant Food Con.stit- 



uents per Acre 



Surface Soil to depth of 6| inches, 



2,000,000 lbs. 



Subsoil to depth of 28 inches, 



8,000,000 lbs. 



DURHAM SERIES. 



The soils of the Durham series are prominent throughout the Pied- 

 mont region in North Carolina, and especially so in Granville, Durham, 

 Vance, Person, Caswell, Guilford, Alamance, Davidson, Wake, John- 

 ston, and other counties. The soils are derived from light-colored, 

 rather coarse grained granite and gneiss, consisting principally of 

 quartz and feldspar, with some mica. These rocks are usually of a 

 more siliceous character and lower in iron-bearing minerals than those 

 giving rise to the Cecil types. The topography is gently rolling to 

 rolling, and by reason of loose texture of the soil', and the rather sandy 

 texture of the subsoil, drainage conditions are excellent and in places 

 even excessive. As a rule, the soils are deficient in organic matter, and 

 require applications of manure or fertilizers in order to give good re- 

 sults.^ These soils are renowned tobacco soils of North Carolina and 

 Virginia. 



The Durham Series is represented thus far in the areas mapped by 

 the following types : the coarse sandy loam, sandy loam, and fine sandy 

 loam. 



DURHAM SANDY LOAM. 



The surface soil of the Durham sandy loam consists of a light-gray 

 medium sandy loam, extending to a depth of 6 to S inches, grading into 

 a pale-yellow medium, sandy loam, which continues to a depth of about 

 15 inches. The subsoil is a yellow, sandy clay or friable clay, usually 

 extending to a depth of 3 feet or more. In some places a few quartz 

 gravel and angular stones are present, and also small mica scales. Oc- 

 casionally the soft granitic rock comes near the surface in eroded areas. 

 Dikes of greenish diorite rock are frequent throughout the type. This 

 is the most widely distributed soil of the Durham series, and has been 

 map])ed in Alamance, Cabarrus, Granville, Forsyth, Mecklenburg, 

 Johnston, and Iredell counties. 



The Durham sandy loam is a mellow and easily tilled soil, and when 

 properly handled it seldom bakes. It is particularly well adapted to 

 the production of bright yellow tobacco, and is devoted largely, through- 

 out the northern part of the State, to that crop. The leaf cures to an 

 attractive color, and brings a high price on the markets. The soil is 



