32 



BULLETIN 618, U. S. DEPARTMENT OF AGRICULTURE. 



RESULTS AT AMARILLO, TEX. 



The Amarillo Cereal Field Station is located in the center of the 

 Texas Panhandle on a chocolate clay loam soil at an altitude of 

 3,676 feet. The average annual precipitation for the past 24 years 

 is 21.2 inches. The experiments are conducted by the Office of 

 Cereal Investigations in cooperation with the Amarillo Chamber of 

 Commerce. 



The data presented in Table XII and shown graphically in figure 

 12 cover the 11-year period from 1906, when the station was estab- 

 lished 7 to 1916, inclusive. Three varieties of durum wheat belong- 

 ing to two different groups have been grown throughout this period. 



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

 varieties of common wheat grown at the Cereal Field Station, Amarillo, Tex., during the 

 eleven years from 1906 to 1916, inclusive. 



[Data obtained in cooperation -with the Amarillo Chamber of Commerce.] 





C.I. 



No. 



Yield per acre (bushels). 



Class, group, and 

 variety. 



1906 



1907 



1908 



1909 



1910 



1911 



1912 



1913 



1914 



1915 



1916 



Aver- 

 age, 11 

 vears, 

 "1906 





























to 

 1916. 



Durum: 



Kubahka — 



Saragolla 



Marouani 



Common: 



Crimean (winter- 



2228-1 



2235-1 



1440 



1558 



1395-2 

 1596 

 2398 



7.6 

 5.3 

 8.0 



25. 8 



18.5 

 5.1 



4.9 



8.5 

 10.4 

 4.3 



3.3 



1.4 

 10.7 

 10.6 



15.3 

 16.8 

 16.8 



23.2 



25.8 

 19.5 

 18.0 



6.5 

 5.7 

 5.9 









 8.5 



7.5 



2.7 

 2.8 

 3.1 



10.2 



10.4 

 3.6 

 3.9 



11.1 

 11.6 

 9.3 



1.6 



.4 

 9.0 

 11.0 



14.0 

 11.0 

 14.5 



16.0 



14.3 

 14.8 

 13.7 



8.5 

 3.9 



4.9 



6.5 



4.8 

 4.5 

 4.8 



12.7 

 15.5 

 12.5 



26.8 



23.0 

 11.5 



8.7 



11.7 

 14.3 

 7.3- 



19.2 



18.0 

 9.5 

 7.8 



5.5 

 4.2 

 3.9 



4.3 



6.7 

 J.4 

 1.6 



9.5 

 9.2 

 8.2 



12.4 



Mediterranean (win- 

 ter)— Diehl-Medi- 



11.2 



Preston — Fretes 



Galgalos — Galgalos. . 



9.1 



8.4 



The yields of one representative of each of the hard red and the 

 soft red groups of winter wheat and of each of two groups of spring 

 wheat are tabulated for comparison. Climatic conditions are severe, 

 and no yields are high. Winter varieties are better adapted and 

 yield better than any spring wheat. Among the groups of spring 

 wheat there is little choice from the standpoint of yield. The little 

 difference that exists is in favor of the durum varieties, but it is in 

 no way significant, nor is there any marked difference in the per- 

 formance of the durum varieties. Saragolla and Marouani have a 

 slight advantage over Kubanka, the variety which is best adapted 

 at many of the northern stations. The two former varieties came 

 from the Mediterranean district, but the latter is of Russian origin. 



