MARYLAND GEOLOGICAL SURVEY 



171 



Cora, wheat, and grass are also produced upon the jSTorfolk loam. 

 Wheat yields from 7 to 15 bushels, corn from 20 to 35 bushels, and 

 hay from three-fourths of a ton to l^/'o tons per acre. Some difficulty 

 has been experienced in recent years in the production of clover. 

 Cattle and sheep raising are carried on to some extent, but the un- 

 certainty of the grass crop and the lack of practical experience in 

 dairying have largely prevented the introduction of these desirable 



industries. The Norfolk loam, though exhibiting some differences 

 in character over small areas, presents a constant type of soil adapted 

 to the production of Maryland tobacco, and gives fair returns in 

 general farming operations. 



The soil and subsoil in this area are of a somewhat finer-grained 

 texture than elsewhere in southern l\Iarvland. 



THE SUSQUEHANNA CLAY, 



The Susquehanna clay covers more than 35 square miles of ter- 

 ritory, lying along the main railroad lines connecting Washington 

 and Baltimore. The greater part of the area remains uncultivated. 



