12 



AGEICULTUEE IN THE SEMIAEID GREAT PLAINS, 



fT. LARAMJ£^ 



iPUJ^LO 



102^ lor u 



Fig. 1.— Map of the central part of the semiarid portion of the Great Plains, showing the average annual 

 precipitation. In the region shown in the unshaded part of the map there is less than IG inches of 

 precipitation during the year; the lightest shading shows from If) to 18 inches: the medium shading, 

 from 18 to 20 inches; the heaviest shading, more than 20 inches. 

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