EXPERIMENTS WITH DURUM WHEAT. 



25 



Table IX. — Annual and average yields of one variety of durum wheat and five varieties 

 of common wheat grown at the Minnesota Agricultural Experiment Station, University 

 Farm, St. Paul, Minn., during periods of varying length in the four years from 1913 to 

 1916, inclusive. 



[Data presented by courtesy of the Minnesota Agricultural Experiment Station.] 





Minn. 



No. 





Yield per 



acre (bushels). 



Class,-group,«and variety. 



1913 



1914 



1915 



1916 



Average. 





3 years, 

 1914 to 

 1916. 



4 years, 

 1913 to 

 1916. 



Durum: 



990 

 845 



1239 



285 

 924 

 169 



25.7 



41.9 

 38.6 

 43.5 

 33.8 



30.3 



47.8 



27.7 

 27.0 

 26.5 



26.7 



46.7 



57.0 



50.0 

 49.2 

 46.7 

 39.9 



23.8 



33.3 



26.3 

 23.2 

 22.7 

 23.3 



33.6 



46.0 



34.7 

 33.1 

 32.0 

 30.0 



31.6 



Common: 





Fife: 



36.5 





34.5 





34.9 





30.9 







RESULTS AT CROOKSTON, MINN. 



The Northwest Experiment Station at Crookston, Minn., is located 

 on a heavy clay loam at an altitude of 863 feet. It has an average 

 annual rainfall of 21.8 inches in a 26-year period. The experiments 

 there have been conducted independently by the Minnesota Agricul- 

 tural Experiment Station and are presented here through the courtesy 

 of the director and his associates. 



The data cover the period of five years from 1912 to 191 6, inclusive, 

 as shown in Table X and figure 8. Yields are given of three durum 

 wheats of two different groups and of four common wheats, repre- 

 senting the three leading spring groups. The three durum varieties 

 excel Glyndon, Haynes, and Preston by from 2 to 5 bushels per acre. 

 Only the two durums in the Kubanka group outyield Marquis, 

 however, and then by only 0.6 bushel in one case and 1.9 bushels in 

 the other. 



Table X. — Annual and average yields of three varieties of durum wheat and four varieties 

 of common wheat grown at the Northwest Agricultural Experiment Station, Crookston, 

 Minn., during the five years from 1912 to 1916, inclusive. 



[Data presented by courtesy of the Minnesota Agricultural Experiment Station.] 



Class, group, and variety. 



Yield per acre (bushels). 



1912 



1913 



1914 



1915 



1916 



5-year 

 average. 



Durum: 



Kubanka — 



33.4 

 32.2 



28.2 



27.8 

 26.5 

 33.4 



38.5 



21.6 

 27.8 

 25.3 



21.4 

 20.4 

 18.2 

 17.4 



22.3 

 14.6 

 13.4 



23.9 

 17.8 

 17.7 

 19.2 



34.5 

 38.0 

 32.6 



40.0 

 30.9 

 28.1 

 23.3 



16.6 

 9.6 

 11.6 



5.8 

 3.1 

 4.9 

 2.2 



25.7 

 24.4 





22.2 



Common: 



Fife— 



23.8 



Glyndon (Minn. No. 163) 



19.7 

 20.5 





20.1 







a Average of the y 

 14644° 18 Bull. 618 4 



elds of t 



wo plats 











