18 
BULLETIN 1045, U, S. DEPARTMENT OF AGRICULTURE. 
Table 1. — Comparison of the yields per acre of sunflower, com, and sorgo silage. 
[Yields obtained under irrigation are given in italic figures; those not in italic were 
obtained without irrigation.] 
Year. 
Yields per acre (tons). 
Locality. 
Sun- 
flowers. 
Corn. 
Sorgo 
(cane). 
1919 and 1920 
1918 
oil. 6 
28.4 
1.6 
22.5 
7.0 
23.1 
19.9 
13.0 
36.8 
31.1 
a 33.6 
3.3 
19.4 
32.9 
27.8 
12.0 
20.0 
4.3 
10.5 
3.0 
8.3 
12.6 
12.8 
15.2 
a 16. 3 
10.0 
18.3 
25.0 
15.5 
18.0 
18.0 
24.4 
17.1 
20.3 
39.0 
a6.0 
10.8 
Umatilla, Oreg 
1917 
1920 
Do 
1920 
1917 
14.2 
13.0 
10.0 
Do 
1918 
1919 
1915 
Do 
1916 
Do 
1917 and 1918 
1920 
2.6 
10.5 
9.3 
10.4 
1917 * 
1918 
1919 
1919 
1919 
1920 
1918 
1919 
1920 
1917 
1918 
Do 
Do 
State College, N. Mex 
15.0 
3.9 
6.1 
2.0 
4.0 
bl0.4 
8.2 
10.4 
a I4.6 
10.0 
20.0 
Do 
Do 
Newell, S. Dak... 
Do 
ell. 3 
Redfield, S. Dak 
1920 
1917 to 1919 
1919 
1918 
1919 
1919 
1919 
1919 
1895 
(d) 
(0 
1919 
15.5 
Scottsbluff, Nebr 
St . Paul, Minn 
15.6 
11.0 
8.5 
7.5 
15.8 
16.9 
14.0 
16.7 
Do 
17.2 
a The yield given is the average for the years specified. 
b The corn yields listed are those of the Payne White Dent, the highest yielding variety which matured 
sufficiently to make good silage. Red Cob corn, a southern variety, made an average yield of 13.15 tons per 
acre for the two years, but was so immature when harvested that the silage was of very poor quality . 
c The Red Amber sorgo was too immature when harvested to make good silage. 
d Average yields of Mammoth Russian sunflower and White Cap Yellow Dent corn each for 13 years 
and Minnesota Amber sorgo 15 years. 
e Average yields of Black Giant sunflower and Wisconsin No: 7 corn each for 13 vears and Orange 
sorgo 15 years. 
There are other tests of these crops mentioned in agricultural litera- 
ture, but no definite yields are given. In the Quarterly Bulletin of 
the Michigan Agricultural College for May, 1920, it states that in 
1919 careful estimates of the yields on eight farms in Ogemaw, Grand 
Traverse, Otsego, and Emmet Counties showed that " on an average 
sunflowers yielded 20 per cent greater tonnage per acre than the corn 
grown in the same fields. On the college farm at East Lansing, a 
3-acre strip of sunflowers produced a 30 per cent greater tonnage than 
an equal area of corn adjacent." C. B. Tillson, county agricultural 
agent of Clinton County, N. Y., writing in the Rural New Yorker, 
February 21, 1920, says that there were 30 tests of sunflowers in Clin- 
ton County in 1919 and that in many instances the sunflowers out- 
yielded corn from 30 to 35 per cent. He adds that the sunflowers out- 
