8 



DRY-LAND GRAINS FOR NORTH AND SOUTH DAKOTA. 



at Brookings. These were tested for several years, the best being 

 grown in field tests. Some were grown as early as 1902 at Mellette, 

 S. Dak., and in 1903 at the substation at Highmore. l^ater, when 

 cooperative work was begun at the substations at Edgeley and Dick- 

 inson, N. Dak., the best varieties were sent there for trial. In 1908, 

 when the work at the Bellefourche experiment farm was inaugurated, 

 only those varieties which these various tests had shown to be best 

 were used. 



In the progress of the work at various places many varieties have 

 been discarded, so that those which are being grown at present may 

 be regarded as the best of their class. 



Tables III, IV, and V show the average and annual yields of the 

 durum and common wheats at the three experiment farms under 

 discussion. In Table IV, which shows the yields at Highmore, two 

 columns of averages are given, as most of the common wheats were 

 not grown until two years after the durum wheats were introduced. 



Table III. — Yield per acre of spring wheat groivn at the experiment farm, Bellefourche, 



S. Dak., in 1908 and 1909. 



DURUM WHEAT. 



COMMON WHEAT. 



3025 

 3022 

 3020 

 2492 

 fl517 



Powers' Fife 



Rysting's Fife 



Haynes' Pedigreed Bluestem. 



Manchuria 



Ghirka Spring 



17.9 

 17.2 

 16.1 

 16.1 

 14.0 



a Average of two check plats. 



b Average of three check plats. 



c Yields are not strictly comparable with others, because of a ilitlerence in the size of tlie plats. 



[Cir. 59] 



