EXPERIMENTS WITH DURUM WHEAT. 



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Fig. 12.— Diagram showing the location of fifteen stations in the Great Plains area and the average yield 

 of the leading variety of durum wheat and the leading variety of each of several different groups of 

 common wheat at each station during the periods of years indicated: 1, Average of only four years (Blue- 

 stem at Moccasin, Crimean at Dickinson, Preston at Langdon); 2, average of only six years (Preston at 

 Dickinson and Edgeley ) ; 3, average of only seven years (Preston at Newell) ; 4, average of only five years 

 (Crimean at Highmore). 



