24 



BULLETIN 618, U. S. DEPABTMEXT OF AGBICULTUKE. 



Kubanka durum excels Preston and Fife by yields that are fairly 

 significant. It nearly ties with Kharkof for second place, but is 

 outyielded by Bluestem to a degree that is fairly significant. Whether 

 it would pay to grow a durum variety under these conditions would 

 depend in part upon the average quality of the grain of the different 

 varieties and in part on the frequency of rust attack. 



Table VIII. — Annual and average yields of one variety of durum wheat and four varieties 

 of common wheat grown at the Ashland (Wis.) branch station during periods of varying 

 length in the four years from 1908 to 1911, inclusive. 





Yield per acre (bushels). 



Class, group, and variety. 



1908 



1909 



1910 



1911 



Average. 





3 vears, 

 1908, 1910, 

 and 1911. 



4 years, 



1908 to 



1911. 



Durum: 



22.1 



27.7 

 15.0 

 18.7 

 17.0 



22.0 

 18.2 

 16.8 



26.0 



27.3 

 22.8 

 26.0 



20.7 



22.1 



20.4 

 33.0 

 18.8 

 17.0 



23.4 



27.1 

 23.6 

 21.2 

 18.2 



23.0 



Common: 



24.9 







Fife— Glyndon (Minn. No. 163) 



20.0 









a Excessive rainfall (more than 12 inches in 3 days) in July, 1909, so affected the yields of winter wheat 

 that they were not considered of value for comparative purposes. 



RESULTS AT ST. PAUL, MINN. 



The Agricultural Experiment Station at University Farm, St. 

 Paul, Minn., is situated in a light sandy loam soil at an altitude 

 of 837 feet. The normal annual rainfall is 28.7 inches. The experi- 

 ments have been conducted independently by the Minnesota Agricul- 

 tural Experiment Station, and the results are presented here by the 

 courtesy of the director and his associates. 



The yields presented include those of fiYe varieties of wheat, 

 namely, Kubanka durum and a leading representative each of the 

 Crimean group of hard red winter wheats and the Fife, Preston, 

 and Bluestem groups of hard spring wheat. The data are given in 

 Table IX and are shown graphically in figure 8. 



It will be noted that in the 3-year period, 1914 to 1916, inclusive, 

 the Turkey winter wheat outyields all the others by 11 to 15 bushels 

 per acre. Marquis, in the Fife group, outyields all the other spring 

 wheats by about 1 bushel per acre, Kubanka durum standing second. 

 In 1913 the Turkey wheat was not grown, while the yield of Kubanka 

 was comparatively low. In the four years from 1913 to 1916, inclusive, 

 the Kubanka is outyielded by Marquis, Glyndon, and Preston in quan- 

 tities that are significant, while it outyields Haynes by only 0.7 bushel. 



From the showing made in these years the growing of durum wheats 

 in the vicinity of St. Paul would be justified only by their superior 

 rust resistance in comparison with common wheats. 



