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Nebraska Experiment Station Research Bui. 15 
FARM TYPES IN NEBRASKA 
BOUNDARIES OF TYPE AREAS 
The boundaries of type areas in Nebraska are to a large 
extent determined by heat, rainfall, and soil. To map the 
principal areas of the State having a fairly uniform type of 
farming, crop lines are used to register heat effects as slightly 
modified by rainfall and other factors, while size-of-farm lines 
are used to register rainfall effects as slightly modified by heat 
and other factors. In one case, that of the Sand Hills, soil is 
used independently to determine the outer boundaries of two 
types. 
A key to all boundary lines is shown in figure 36. It 
will be observed that in general the northern and southern 
boundaries of type areas are determined by the type of annual 
cropping, and the eastern and western boundaries by the size 
of farm. The data used in determining these lines were se 
cured from the Thirteenth Census. The Fourteenth Census 
