28 



Thk Bulletin 



In the following table is given the analyses of Durham fine sandy- 

 loam type of soil and subsoil: 



AVERAGE CHEMICAL ANALYSIS. 



Surface soil- 

 Subsoil 



AVERAGE MECHANICAL ANALYSIS. 



Fine 



Gravel, 



Per Cent 



3.8 



4.8 



Coarse 



Sand, 



Per Cent 



11.6 

 10.0 



Medium 



Sand, 

 Per Cent 



15.2 

 9.8 



Fine 



Sand, 



Per Cent 



33.4 

 17.0 



Very Fine 



Sand, 

 Per Cent 



13.6 



7.6 



Silt,. 

 Per Cent 



19.2 

 20.1 



Clay, 

 Per Cent 



3.3 

 30.6 



IREDELL LOAM. 



The Iredell loam, locally called ''bull tallow" or "blackjack" oak 

 land, comprises about 9,000 acres. It is readily recognized from the 

 other soils by the peculiar or putty-like character of the subsoil and 

 the dominant blackjack oak growth. 



The surface soil is a dark gray to dull bro\vn loam, having a depth 

 of 6 to 12 inches. The subsoil is a dingy yellow or yellowish-brown, 

 sticky, waxy, impervious clay, which grades at about 20 to 30 inches 

 into the greenish-yellow soft rotten rock. A few small rounded brown 

 to black iron pebbles or concretions are mixed with the surface soil. 

 Spots of the surface soil are sandy, and again some of it is quite silty 

 and contains slate fragments and even rock. 



Most of this soil lies to the southwest of Stout, northeast of Indian 

 Trail, north of Stewart Mill, and along the Mecklenburg County line 

 bordering the bottom lands of Six-Mile Creek, and also in small areas 

 ill the vicinity of Walkersville Church and about 3 miles east of Wax- 

 haw. The surface is comparatively flat to gently rolling, being broken 

 near the stream courses, and the natural surface drainage is good ex- 

 cept on the flat areas. Underdraiiiage is oxcecdijigly poor on account 

 of the dense structure of the subsoil. 



