40 Yearbook of the Department of Agriculture, 1921. 



Fig. 37. — Nearly 90 per cent of the tobacco acreage is in six States — Kentucky, North 

 Carolina, Virginia, Tennessee, South Carolina, and Ohio. But there are also important 

 centers of production, especially of certain types, in southea-n Maryland, in Lancaster 

 County, Pa., in the Connecticut Valley, and in southern Wisconsin. Tobacco is very 

 sensitive to soil conditions, but these requirements vary with the different types. 



Rice production is now largely confined to the coastal prairies of Lrouisiana and Texas, 

 the prairie district of eastern Arkansas, and the flat valley of the Sacramento in Cali- 

 fornia, all areas of heavy subsoils which hold the irrigation water. 



Flax is giown in the Spring Wheat and Northern Great Plains Areas. Nearly half of 

 the heanp is raised in Wisconsin. 



