Thk Bulletin 



25 



tlie open structure and coarse texture. This soil is deficient in vegetable 

 matter, and it can best be supplied by turning under green manuring 

 crops or adding large quantity of barnyard manure. This organic mat- 

 ter would render the soil more loamy and more retentive of moisture. 

 Increased yields, particularly of corn, can be obtained where the soil 

 is filled with humus. 



The coarse sandy loam is adapted to the same crops and is now being 

 used in the same way as the sandy loam. There is practically no dif- 

 ference in the agricultural value of the two types. 



The following table gives the average results of analyses of soils and 

 subsoils of Durham coarse sandy loam : 



CHEMICAL ANALYSIS. 



MECHANICAL ANALYSIS. 



Fine 

 Gravel, 

 Per Cent 



Surface soiL 

 Subsoil 



12.9 

 9.5 



Coarse 



Sand, 



Per Cent 



18.1 

 11.1 



Medium 



Sand, 

 Per Cent 



12.4 

 8.1 



Fine 



Sand, 



Per Cent 



23.2 

 15.6 



Very Fine 



Sand, 

 Per Cent 



8.2 

 12.1 



Silt, 

 Per Cent 



19.2 

 21.1 



Clay, 

 Per Cent 



5.8 

 22.2 



MECKLENBURG CLAY LOAM 



The Mecklenburg clay loam, commonly known as "red blackjack 

 land," consists of 5 to 8 inches of reddish-brown loam to clay loam. 

 Small rounded brown to black pebbles or concretions, and also a few 

 quartz fragments, are seen on the surface. The subsoil is a yellowish- 

 brown to reddish-brown sticky impervious clay to a depth of 20 to 36 

 inches, where it passes into the lotten rock and finally into hard bedrock. 



There are 10,944 acres of this land in Cabarrus County. It occur> 

 mainly in one large area in the southwestern part of the county, be- 

 ginning about 2 miles southwest of Concord and extending to Harris- 

 burg, being well developed around Patterson'.s Mill and Fairview 

 Church. Its surface varies from nearly level to gently rolling. The 

 more rolling portion has good drainage, but the more level areas require 

 the construction of open ditches to carry off the excess rain water which 

 is retarded in its dowuAvard movement by the impervious character of 

 the heavy subsoil. 



