EXPERIMENTS WITH DURUM WHEAT. 



19 



are the standard varieties in that district. The durum varieties are 

 compared, therefore, with Kharkof (C. I. No. 1442), one of the best 

 yielders in the Crimean group. 



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

 of common wheat grown at the McPherson (Kans.) substation during periods of varying 

 length in the six years from 1904 to 1909, inclusive. 



[Data obtained in cooperation with the Kansas Agricultural 



Experiment Station.] 







C.I. 



No.o 



Yield per acre (bushels). 



Class, group, and variety 



1904 



1905 



1906 



1907 



1908 



1909 



Average. 





5 years, 

 1904-1907 

 and 1909. 



6 years, 



1904 to 



1909. 



Durum: 



Kubanka — 



2246 

 2094 

 2100 



2086 

 2228 



1442 



16.3 

 12.7 

 11.7 



11.0 

 10.3 



25.9 



14.2 

 11.3 



14.5 



11.7 

 9.8 



18.4 



24.0 

 25.6 

 24.5 



21.7 

 16.7 



35.1 





 

 





 



20.9 



(b) 

 13.5 

 (*) 



(b) 

 (b) 



19.5 



13.8 

 12.6 



13.4 



11.6 



10.9 



19.5 



13.7 

 12.4 

 12.8 



11.2 

 9.5 



24.0 





Do 



12.6 







Pelissier— 





Saragolla 



Common: 



Crimean (winter) — Kharkof 





23.2 



a Cereal Investigations number. 



6 Record of yields lost. 



Reference to Table III and figure 8 shows that the Kharkof winter 

 wheat outyields the best durum variety in the ratio of nearly 2 to 1 . 

 Among the durum varieties a Kubanka leads. Since this district is 



Fig. 9. — Heads of representative varieties of five groups of wheat: a, Turkey, a hard red winter 

 wheat; 6, Fife; c, Preston; d, Bluestem; e, Kubanka (durum; edge view). 



not suited to the growing of spring-sown varieties of wheat, it is not 

 surprising that the Crimean wheat so far surpasses the durum. In 

 1906, however, the yields of the durum varieties ranged from 16.7 



