Residual Soils of the Prairie Region. 129 



Fargo clay.— Heavy black clay 6 to 14 inches deep, underlain by 

 gray or blue clay of the same texture. At from 5 to 9 feet occurs 

 a mottled gray, brown, and yellow clay, similar to the subsoil of 

 the Miami black clay loam. When wet this type is very waxy and 

 gummy and has an oily feel. It is exceedingly slippery under foot 

 and often sticks to wagon wheels in great quantities. Very diffi- 

 cult to till. Occurs in depressions in the upland. Drainage poor. 

 Very strong and prod-ctive soil when well drained. Adapted to 



general farm crops. 



1 J 3 4 



Soil (2) 3 12 36 50 



Subsoil (2) 1 7 26 66 



Acres. 

 Fargo, N. Dak 40, 000 



RESIDUAL SOILS OF THE PRAIRIE REOIO>. 



OSWEGO SEEIES. 



The soils of this series are derived from interbedded sandstone, 

 limestone, and shale. 4 



Oswego fine sandy loam. — A yellowish-brown heavy fine sandy 

 loam with a depth of 12 inches resting on a subsoil of the same 

 material of a lighter yellowish color and somewhat heavier in tex- 

 ture. This is an upland soil occupying low, rounded knobs and 

 ridges, and having a rolling surface. The drainage is excellent. 

 The type is residual, being derived from sandstone and arenaceous 

 shale, which occurs in places a few feet beneath the surface. Corn 

 and oats are the important crops, the former yielding from 20 to 

 30 bushels, and the latter about 25 bushels per acre. Very little 

 wheat is grown on this soil, as it is likely to winter-kill. Best 

 adajjted to fruit and truck. 



1 -2 .3 4 



Soil (2) 2 52 32 14 



Subsoil(2j 2 50 32 17 



Acres. 

 Parsons, Kans 9, 728 



Oswego loam. — A gray to yellowish silt loam, to 10 inches deep, 

 grading into a stiff clay, becoming stiffer and more impervious as 

 the depth increases. Occupies gently rolling upland prairies. De- 

 31896—04 9 



