CEREALS OX THE BELLE FOUECHE EXPERIMENT FARM. 
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 
3 7 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. — Agronomic data for fire varieties of spring wheat grown on dry 
land on the Belle Fourche Experiment Farm, 1908 to 1919, inclusive. 
CI. 
No. 
Date of— 
Height. a 
Weight 
Yields per acre. 
Group and variety. 
Head- 
ings 
Matu- 
rity.a 
rust - 6 bufhel.* 
Grain. 
Straw.a 
Fife: 
Power 
c3697 
c2874 
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. Pounds. 
35. 57. 3 
Bushels. 
13.7 
12.3 
14.7 
17.0 
17.5 
Pounds. 
1,837 
Bluestem: 
Haynes 
42.5 
24.0 
10.5 
7.0 
53.7 
56.0 
59.8 
60.3 
1,815 
Ladoga: 
Manchuria 
1,699 
Durum: 
Arnautka 
1,877 
Kubanka 
1,930 
a Average for 9 years (1908 to 1910, 1913 to 1917, and 1919). 
t> Average for 2 years (1915 and 1916). 
c Power, C I. No. 3025, grown from 1908 to 1916, inclusive. 
d Date of heading computed in 1914. 
< Haynes, C I. No. 3020, grownfrom 1908 to 1912, inclusive. 
KATE-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-peck 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 
