EXPERIMENTS WITH DURUM WHEAT. 



55 



precarious crop in this district and are not able to outyield the best 

 spring varieties of common wheat. Durum varieties are evidently 

 not suitable for growing in this valley. 



RESULTS AT MORO, OREfi. 



The Eastern Oregon Dry-Farming Substation is located in Sher- 

 man County, on the rolling hills of the Columbia Basin, at an average 

 altitude of 1,800 feet. The soil is a silt loam. The average annual 

 rainfall has been 1 1 .3 inches in the past 11 years. The station is oper- 

 ated cooperatively by the Oregon Agricultural Experiment Station 

 and the Office of Cereal Investigations. 



The yields obtained from 1911 to 1916, inclusive, are shown in 

 Table XXX, and the principal facts are portrayed in figure 13. Only 

 two durum varieties have been grown throughout this period. 

 Their yields, while good, still are lower than those of any variety 

 of common wheat shown. This is true in both the 4-year and the 

 6-year periods. The Turkey hard red winter wheat is the best of all, 

 closely followed by Early Baart and Koola. These latter two varie- 

 ties are both bearded wheats, the first one with white, the other 

 with red kernels. Durum wheats are not likely to become important 

 in the Columbia Basin on the basis of the showing made. 



Table XXX. — Annual and average yields of two varieties of durum wheat and six 

 varieties of common wheat grown at the Eastern Oregon Dry-Farming Substation, Moro, 

 Oreg., during periods of varying length in the six years from 1911 to 1916, inclusive. 



[Data obtained in cooperation with the Oregon Agricultural Experiment Station. j 





C.I. 



No. 







Yield per 



icre (bushels). 





Class, group, and variety. 



1911 



1912 



1913 



1914 



1915 



1916 



Average. 





4 years. 

 1913 to 

 1916. 



6 years, 



1911 to 



1916. 



Durum: 



Kubanka — 



/1440 

 \1516 

 2511-2 



2203-2 

 1558 

 1697 

 4068 

 4158 

 4067 



} 11.0 

 3.5 



16.2 

 7.5 



16.0 

 18.0 



25.8 

 24.0 

 25.0 

 19.6 

 22.1 

 19.4 



21.5 

 18.3 



24.5 

 27.5 

 26.0 

 19.2 

 22.5 

 20.9 



18.0 

 23.6 



33.2 

 20.6 

 26.6 

 26.0 

 23.1 

 24.0 



29.5 

 37.2 



44.6 

 55.0 

 41.0 

 42.3 

 35.3 

 37.3 



21.3 

 24.3 



32.0 

 31.8 

 29.7 

 26.8 

 25.8 

 25.4 



18.7 



B16Noix 



1S.0 



Common: 





Crimean (winter) — Turkey 



9.0 

 14.5 

 13.1 



20.6 

 19.0 

 22.6 



26.1 

 25.4 



Little Club— Little Club 



23.8 







White Australian — Pacific Bluestem... 



11.7 



20.1 



22.2 



RESULTS AT CHICO, CAL. 



The Chico Plant Introduction Garden is located in the Sacramento 

 Valley, at an altitude of 189 feet, on a sandy loam soil containing 

 some gravel. The normal annual precipitation is 23.6 inches, 

 according to the records of 45 years. The garden is maintained by 

 the Office of Foreign Seed and Plant Introduction of the Bureau of 



