EXPERIMENTS WITH KHERSON AND SIXTY- DAY OATS. 
61 
water supply the period of plant growth is lengthened somewhat. 
As the oat plant requires large quantities of water for its best develop- 
ment, high yields of grain of excellent quality usually are produced 
in irrigated districts. 
Table XLIX. — Altitude, average annual and seasonal precipitation, mean seasonal 
temperatures, and general soil types at five experiment stations in the northern Great 
Plains and western basin areas. 
Alti- 
tude. 
Climatological data. 
Station. 
Length 
record. 
Average 
precipitation. 
Mean temperature (°F.). 
General soil type. 
Annual. 
Season- 
al.i 
June. 
July. 
Aug. 
Newell, S. Dak 
Bozeman, Mont 
Feet. 
2,950 
4,700 
4,400 
3,600 
4,532 
Years. 
9 
35 
6 
7 
22 
Inches. 
13.98 
18.60 
9.80 
9.20 
8.65 
Inches. 
9.20 
10.97 
4.84 
2.92 
2.15 
65.0 
2 58.7 
72.0 
2 65. 8 
69.0 
2 64.3 
Sandy loam. 
Sandy clay loam, lava 
ash. 
Medium clay loam. 
Gooding, Idaho 
62.3 
62.4 
70.1 
69.8 
68.5 
69.2 
April to August, inclusive. 
2 Twenty-nine year average. 
Results under Irrigation in South Dakota. 
The Sixty-Day oat has been included in varietal experiments con- 
ducted under irrigation at Newell since 1912. The annual and aver- 
age yields of the Sixty-Day and of three other varieties which have been 
grown during the 6-year period from 1912 to 1917, inclusive, to- 
gether with the yields of one variety grown during three years, are 
given in Table L. 
Table L. — Annual and average yields of the Sixty-Day and four other varieties of oats 
grown under irrigation at the Belle Fourche Experiment Farm, Newell, S. Dak., during 
three or more years in the 6-year period from 1912 to 1917, inclusive. 
[Data obtained in cooperation with the Office of Western Irrigation Agriculture and since 1912 with the 
South Dakota Agricultural Experiment Station.] 
C I. 
No. 
Yield per acre (bushels). 
Group and variety. 
1912 
1913 
1914 
1915 
1916 
1917 
Average. 
1912 
to 
1917 
1914 
to 
1917 
Early yellow: 
Sixty-Day 
105 
134 
444 
778 
5ol 
25.0 
35.2 
31.2 
47.1 
33.0 
39.3 
32.5 
41.6 
42.4 
50.7 
48.6 
34.0 
46.5 
44.7 
51.8 
52.8 
28.8 
36.9 
25.2 
37.4 
42.1 
51.5 
54.6 
65.8 
57.8 
C6.2 
36.5 
41.3 
41.4 
45.8 
36.7 
Midseason white: 
Swedish Select 
44.9 
44.5 
49.4 
Late white (side): 
White Russian 
41.4 
33. 7 
49.9 
1 Similar to Swedish Select; original seed supposed to have been obtained from Norway. 
