20 
BULLETi:^ 1306, U. S. DEPARTMENT OF AGRICULTUEE 
being midway between that of the early dent varieties and that of 
varieties of the Minnesota No. 13 type, but their value can hardly 
be determined without further trial. 
RATE-OF-SEEDING TESTS 
Experiments with rates of seeding have been conducted with win- 
ter wheat, spring wheat, oats, and barley. The work with oats and 
barley was discontinued after 1920. 
WINTER WHEAT 
Winter wheat was seeded at the rate of 2, 3, 4, 5, 6, and 8 pecks 
per acre on three different dates, August 15, September 15, and 
October 15. The 3, 4, and 6 peck rates were seeded also on the first 
of each of the above-named months and the first of November, 
making seven seedings each year at these rates. Table 17 shows 
the average yield for each rate for each year and the average yields 
for the 6-year period from 1918 to 1923, inclusive. 
Table 17. — Annual and average yields of winter wheat] spring wheat, oats, and 
barley sown at the rates specified for the years shown during the 7-year period 
from 1917 to 1923, inclusive 
Yields per acre (bushels) 
Crop and rate of seeding per acre 
1917 
1918 
1919 
1920 
1921 
1922 
1923 
Aver- 
age 
Winter wheat: 
2 pecks' _ - 
55.4 
53.2 
54.8 
54.3 
54.7 
54.0 
52. S 
54.0 
53.8 
17.2 
17.5 
19.1 
19.2 
17.5 
16.8 
36.1 
37.7 
38.3 
33.8 
40.4 
35.4 
2.5.3 
28.8 
33.2 
30.5 
32.9 
31.1 
7.2 
7.9 
8.8 
10.0 
9.9 
S.4 
•7.4 
7.7 
8.3 


















36.5 
37.6 
40.4 
42.0 
43.0 
44.0 
36.9 
39.3 
42.4 
11.6 
13.1 
15.3 
16.0 
16.2 
18.0 
25.0 
32.5 
35.5 
32.1 
31.3 
32.9 
20.0 
35.0 
36.9 
34.7 
40.8 
41.1 
22.3 
22.2 
23.1 
25.3 
28.8 
29.1 
20.3 
20.9 
25.4 
1.9 
2.4 
2.7 
2.9 
2.6 
2.6 
35.^0 
35.2 
39.9 
42. S 
43.4 
44.4 
36.7 
37.6 
42.8 
29.1 
24.4 
28.0 
23.6 
26.5 
244 
23.2 
25.0 
27.7 
31.0 
33.1 
341 
22.2 
23.9 
28.1 
22.9 
23.8 
22.9 
24 7 
22.0 
20.0 
29.9 
3 pecks'. 
30.2 
4pecks'-- ... 
32.5 
Specks' 
34 2 
6 pecks' 
35.5 
Specks' 
35.7 
3 pecks 2 . . . . . 
29.4 
4 pecks 2 
30.6 
6 pecks2 
33.5 
Spring wheat: 
2pecks . 
6. 7 
5.8 
49 
4.9 
4.7 
12.8 
12.6 
4 pecks -- - 
13.4 
13.0 
6 pecks 
12.8 
Specks - - - - 
12.4 
Oats: 
3 pecks ....--..-. 
16.3 
17.9 
IS. 8 
20.0 
18. S 
21.6 
4 pecks 
Specks 
6 pecks . -- -- -- 
22.9 
21.2 
22.9 
S pecks 
21.8 
Barley: 
3 pecks 
10.0 
13.6 
13.3 
12.5 
7.0 
18.5 
4 pecks 
20.9 
19.6 
6 pecks 
21.6 
Specks - 
19.8 
Average of three dates of seeding. 
Average of seven dates of seeding. 
It will be noted that in general the yield increased directly with 
the increased quantity of seed used from the 2-peck rate to the 8-peck 
rate. The difference in average yield with the two highest rates of 
seeding, 6 and 8 pecks, is very small, amounting to less than half the 
difference in the quantity of seed used. Between the 4-peck and 
6-peck rates of seeding the average difference in yield for the seven 
