CEREALS ON" THE BELLE FOURCHE EXPERIMENT FARAL. 



17 



Only five varieties were grown during the entire 12-year period. 

 Of these only two, Arnautka, C. I. No. 1493, and Kubanka, C. I. No. 

 1516, were grown continuously from the same original strain. In 

 order to have the expeiiments coordinated with other experiments 

 with wheat in the northern Great Plains, seed of Power and Haynes 

 wheat having different C. I. numbers than those previously grown 

 was used in the later years. In 1918 and 1919 a selection of Man- 

 churia was substituted for the parent variety in the experiments. 

 Table VIII shows the average dates of heading and ripening, the 

 average height, the average percentage of stem-rust infection, the 

 average weight per bushel, and the average yields of grain and straw 

 of the five varieties of spring wheat grown during each of the 12 

 ^ears from 1908 to 1919, inclusive. 



The durum varieties shown have higher yields of grain and straw, 

 a heavier weight per bushel, and a lower stem-rust infection. The 

 Manchuria variety is considerably earlier and the Haynes much later 

 than the other varieties shown. 



Table VIII. — Ayronomic data for five varieties of spring wheat grown on dry 

 land on the Belle Fotirche Experiment Farm, 1908 to 1919, inclusive. 





C.I. 



No. 



Date of— 



Height .o 



Stem 

 rust. 6 



Weight 



Yields per acre. 



Group and variety. 



Head- 



ing.a 



Matu- 

 rity.a 



per 



bushel. o 



Grain. 



Straw." 



Fife: 



Power 



C3697 



e2874 



2492 



1493 

 1516 



July 8 d 



July lid 



July 1 



July 4 

 July 5 



July 31 



Aug. 2 



July 27 



July 30 

 ...do 



Inches. 

 28 



29 



31 



33 

 30 



Per cent. 

 35.0 



42.5 



24,0 



10.5 

 7.0 



Pounds. 

 57.3 



53.7 



56.0 



59.8 

 60.3 



Bushels. 

 13.7 



12.3 



14.7 



17.0 

 17.5 



Pounds. 

 1,837 



Bluestem: 



Haynes 



1,815 



Ladoga: 



Manchuria 



Durum: 



Arnautka 



1,699 

 1, 877 



Kubanka 



1, 930 











a Average for 9 years (1908 to 1910, 1913 to 1917, and 1919). 



6 Averagefor 2 years (1915 and 1916). 



c Power, C. I. No. 3025, grown from 1908 to 1916, inclusive. 



<i Date Of heading computed in 1914. 



< Haynes, C. I. No. 3020, grownfrom 1908 to 1912, inclusive. 



RATE-OF-SEEDING EXPERIMENTS. 



A rate-of-seeding experiment with Kubanka durum wheat, C. I. 

 No. 1440, was conducted during the 9-year period 1909 to 1917, 

 inclusive. The wheat was not sown in 1911, and the crop failed in 

 1912 on account of drought. The yields were too low to be of much 

 significance in 1910 and 1914. In 1915 the yields were exceedingly 

 large. The experiment was conducted on single tenth-acre plats in 

 1909 and 1910, but in triplicate fiftieth-acre plats in all other years. 



The rates of seeding ranged by 1-peok intervals from 2 to 8 pecks 

 per acre, but the wheat was not sown at all of these rates during all 

 years of the experiment. The annual and average yields obtained in 

 the rate-of-seeding experiment are shown in Table IX. 

 77754°— 22 3 



