Farm Types in Nebraska 
19 
occupy relatively small areas within those already mentioned. 
The winter-summer type develops at certain points within the 
summer-winter areas. The largest developments of this type 
are in western Kansas and southeastern Pennsylvania. The 
winter-spring type may develop in either the spring-winter 
or the winter-summer areas. Its most accurately defined area 
covers a part of southeastern Washington and north-central 
Oregon. This type is also indicated on the map as occurring 
in Idaho, Utah, Montana, Colorado, Michigan, Ohio, and 
Pennsylvania. In as far as was possible to determine, the 
southern states belong largely in the summer-spring type of 
cropping. Tho the name of the southern type of annual 
cropping is the same as that applied to the cropping in the 
northern part of the Corn Belt, the two regions are very 
different when one comes to compare the per cent of annuals 
falling in the summer group. In the southern states the sum- 
mer group commonly occupies from 85 to 90 per cent of the 
acreage of land given to crops treated as annuals, while in the 
northern part of the Corn Belt this group occupies only 50 to 
60 per cent of such acreage. If the above measurements are 
true the cropping in the northern half of the Corn Belt and 
the cropping in the southern states may be looked upon as 
examples of two divisions of the summer-spring sype. 
CROSS- SECTIONAL VIEWS 9E VARIOUS TYPES OF ANNUAL CROPPING 
The cross-sectional views (Figs. 8 and 9) drawn from 
data entering into the map on page 18 make it possible to 
study the relationship of one type to another. Figure 8 is 
a cross-sectional view along a line extending from southern 
Arkansas to the extreme northern part of Michigan. The per 
cent of the acreage of annuals given to the winter group is 
extremely low along the line in Arkansas; but by the time 
one reaches St. Louis County in Missouri, the winter group 
has come to occupy over 50 per cent of the land in annuals. 
To the north of this county, winter annuals drop out rapidly. 
If the acreage of spring rye does not have too great an in- 
fluence, one can say that there is a tendency for winter an- 
