THE MIAMI SERIES OF SOILS. 57 
The Miami clay loam has its greatest development in the eastern 
region where winter wheat still constitutes an important crop. 
The acreage reported in wheat for the Ohio counties dominated by 
this type is decidedly less than that devoted to oats, but in Indiana 
the acreage nearly equals that in oats. In both cases winter wheat 
ranks fourth in acreage among the staple crops. In both States it is 
generally reported that the acreage in winter wheat is being re- 
duced, although this crop retains an important place in the farming 
system. The average yield for the Miami clay loam in western 
Ohio is approximately 14 bushels per acre, the yields ranging from 
12 to 20 bushels. In Indiana the average yield is 15 to 16 bushels 
per acre, with about the same range. In both cases the yields are 
slightly less than the averages for the respective States. Consid- 
erable wheat is also grown upon the Miami clay loam in southern 
Michigan, and the yields reported are larger than in either Ohio 
or Indiana. They average slightly less than 20 bushels per acre. 
The type is undoubtedly well suited to wheat, but the higher returns 
per acre secured from corn production have tended to increase the 
acreage of that crop somewhat at the expense of wheat. In the 
dairying regions, also, the desire to produce the largest possible 
acreage of forage crops on each farm has led to a gradual aban- 
donment of wheat. 
Barley, rye, and buckwheat are grown only to a small extent on 
the Miami clay loam, although they give good average yields in 
the more northern localities. 
Tobacco constitutes a special crop on the Miami clay loam in south- 
western Ohio and adjoining counties in Indiana. On many farms 
from 5 to 20 acres are annually devoted to tobacco and the yields are 
good, averaging 1,200 pounds or more per acre. Tomatoes also are 
grown to a limited extent in central Indiana, chiefly for canning 
purposes. The type is well suited to this crop. 
The Miami clay loam is developed to some extent in the southern 
counties of Michigan, and small areas are found in southeastern 
Wisconsin. In Michigan it is probable that the hay crop occupies 
the largest acreage of any single crop on the type. Mixed timothy 
and clover constitute the principal hay crop, giving an average yield 
of about 1J tons per acre. Corn is second in acreage, and produces 
an average yield of about 35 bushels per acre in this more northern 
latitude. Oats constitute the principal small-grain crop, and the 
average yield for the Miami clay loam in both Michigan and Wis- 
consin is undoubtedly in excess of 35 bushels per acre. Some beans 
and sugar beets are produced on the type. 
The dominant form of agriculture upon the Miami clay loam is 
grain and grass farming. This is supplemented to a small extent 
