24 
BULLETIN 1039, U. S. DEPARTMENT OF AGRICULTURE. 
The yields from all rates of seeding from 3 to 7 pecks per acre 
are nearly the same. The yields from the 2-peck seedings, however, 
have been the lowest each year. In 1913, 1914, and 1916, the T-peck 
seeding gave the highest yield, while in 1915 the highest yield per. 
acre was obtained from the 4-peck seeding. The T-peck seeding gave 
the highest average yield per acre during the 4-year period, but the 
largest net yield was obtained from seeding at the rate of 4 pecks 
per acre. Sufficient data have not been obtained to draw definite 
conclusions, but apparently 4 pecks per acre is the most profitable 
rate of seeding. 
DATE-OF-SEEDING EXPERIMENTS. 
A date-of-seeding experiment with Turkey winter wheat was con- 
ducted each year from 1908 to 1918, inclusive. Drought destroyed 
the crops of 1911 and 1912, and the wheat was almost entirely 
destroyed by winterkilling and soil blowing in 1916, 1917, and 1918. 
! Some injury from soil blowing resulted in most other years of the 
experiment. The soil blowing usually occurred in early spring- 
before the rains had begun and before the wheat had made much, 
if any, growth. The yields from the date-of-seeding experiment with 
winter wheat during the years in which yields were obtained are 
shown in Table XVI. 
Table XVI. — Yields of Turkey winter wheat grown in date-of-seeding experi- 
ments on dry land on the Belle Fourche Experiment Farm, 1908 to 1910 and 
1913 to 1915, inclusive. 
Date of seeding. 
Yields per acre (bushels). 
1908 
1909 
1910 
1913 
1914 
1915 
Average.^ 
29.2 
28.1 
28.1 
628.1 
28.1 
21.4 
16.3 
16.1 
37.5 
39.0 
40.5 
43.0 
42.0 
37.3 
19.3 
8.3 
22.0 
13.3 
13.2 
23.0 
20.3 
24.3 
24.7 
25.5 
September 16 
c20.2 
21.1 
20.7 
19.1 
61.6 
60.9 
56.5 
55.2 
51.9 
34.1 
35. 5 
October 16 
33.1 
30.7 
a Yields for 1910 omitted because of irregularities. 
b Not sown, yield assumed from earlier and later sowings. 
c Sown September 20. 
d Did not germinate. 
In 1908 the latest date of seeding, November 1, produced the high- 
est yield. In 1909 the October 1 seeding yielded the highest. The 
results in 1910 were very irregular, owing to poor germination and 
soil blowing on some of the plats. In 1913 the August 1 seeding 
gave the highest yield. A seeding was not made the previous fall 
on September 16, but as the yields from the seedings of August 16, 
September 1, and October 1 were all 28.1 bushels, the yield for this 
date was assumed to be the same, in order to determine the average 
