CLASSIFICATION BY THE BUREAU OF SOILS 95 



Oktibbeha Series. These soils are prevailingly dull brown 

 to yellowish brown. The subsoils are composed of somewhat mot- 

 tled yellow, gray and red, rather plastie, silty clay. They are under- 

 lain by soft rotten limestone. The topography is Hat to gently 

 sloping. They are locally known as " post oak lands '' or "post 

 oak prairie lands." When properly bandied they produce good 

 crops of cotton, corn, Johnson grass, lespede/.a, bur clover, and a 

 numl>er of other crops. 



Orangeburg Series. The soils of this series are marked by 

 their gray to reddish brown color and open structure. The subsoils 

 consist of friable sandy clay. They are confined to the uplands of 

 the Atlantic and (iulf Coastal Plains, being most extensively de- 

 veloped in a belt extending from southern Xorth Carolina to cen- 

 tral Texas. This is a very valuable series, its heavier memlx?rs being 

 adapted to corn, cotton, cowpeas, peanuts, potatoes, and cigar leaf 

 tobacco. Xearly five million acres have been mapped. 



Portsmouth Series. These soils are dark gray to black and 

 are high in organic matter. The subsoils are light gray to mottled 

 gray and yellow and the heavier types are always plastic. These 

 soils are developed in flat to slightly depressed, poorly drained situa- 

 tions and require drainage before they can be used for agriculture. 

 They are adapted to corn, strawberries and truck crops such as 

 cabbage, onions and celery. Altogether 2,410,000 acres have been 

 mapped. 



Ruston Series. The soils are gray to grayish brown, and are 

 underlain by reddish yellow to yellowish red or dull red moderately 

 friable subsoils, prevailingly of sandy clay. They are slightly lower 

 in productiveness than Orangeburg. 



San Antonio Series. These soils are brown to chocolate brown 

 in color and have brownish red calcareous subsoils. Thev are de- 

 veloped in the semi-arid regions of southern Texas. Thev are de- 

 rived from calcareous material of sedimentary origin. I'mler irri- 

 gation they give excellent yields of a number of crops such as cotton, 

 corn, sorghum, vegetables, and alfalfa. 



Sassafras Series. These soils arc distinguished by-tbeir yel- 

 lowish brown to brown color and mellow structure. The subsoils arc 

 reddish yellow and friable in structure, resting upon beds of graxel 

 or sand varying from "2\ o to . r > feet in thickness. They are developed 

 along flat marine or estuarine terraces from 10 to 2.">0 feet above 

 sea level. They include some of the most productive soils of the 

 Atlantic seaboard. Excellent crops of wheat, corn, clover, potatoes, 



