62 Nebraska Experiment Station Research Bui. 15 
Fig. 37. — The relative importance of winter, 
the various type areas of Nebraska. (1909) 
sprint 
and summer annuals in 
more closely than they do dry upland western farms. These 
and similar irregularities make it impossible to describe a 
type of farm that will fit all conditions within a given area. 
The numerical descriptions of farm types which follow apply 
more to farming on nonirrigated upland than they do to farm- 
ing on bottom land and irrigated upland. 
FARM TYPES GROUPED FOR THE PURPOSE OF STUDY 
The effects of heat upon the twelve farm types can be 
most accurately studied when the High Plains, Western Sand 
Hills, Eastern Sand Hills, and Boyd types are looked upon as 
northern, the Chase, Buffalo, Custer, and Wayne types as 
central, and the Hitchcock, Harlan, Thayer, and Cass types as 
southern. Rainfall effects can be most accurately studied by 
comparing the Boyd, Wayne, and Cass types with the High 
Plains, Chase, and Hitchcock types respectively. 
