26 BULLETIN 402, U. S. DEPARTMENT OF AGRICULTURE. 
plat of a pure-line selection of Sixty-Day oats is shown in figure 7. 
The Burt oat (C. I. No. 293) has been grown only four years. In 
these years it has averaged 57.9 bushels, as compared with 55.5 
bushels from the Kherson variety for the same period. 
In the fall of 1907 a plat of Boswell Winter oats was sown. While 
the winter survival was low, the plat yielded at the rate of 15.7 
bushels per acre. Seed of this variety has been sown five other 
years, and each time the plants have entirely winterkilled. 
Fic. 7.—Plat of a pure-line selection of Sixty-Day oats at the Akron Field Station, with the farm build- 
ings in the background, in 1910. 
Table XVIII shows the average dates of heading and maturity, 
height, weight per bushel, and yield of five varieties of oats repre- 
senting all three of the spring groups. The White Tartarian was 
not grown in 1909, 1910, and 1911. The average yields are shown 
eraphically in figure 8. 
TaBLE XVIII.—Average dates of heading and maturity, height, yield of grain and straw, 
and weight per bushel of five varieties of oats grown at the Akron Field Station, Akron, 
Colo., 1908 to 1915, inclusive. 
Da f— Yield per acre. 
an tes 0 eld p Weight 
Group and variety. rt Height. per 
No. . F : bushel 
Heading. | Maturity. Grain. Straw. F 
Early: Inches. | Bushels.| Pounds. | Pounds. 
Khersonts:..225.0-5 552 jies-e-2---| 459 | June 26 | July, 20 27 44.7 1,394 31.3 
Sixty-Dayle eee eee ema ae | 165 | June 27 | July 19 27 39.3 1, 418 30.6 
Midseason: 
ColoradoyNors(--sserees eeeeeee 619 | July 6) Aug. 1) 31 43.9 2,014 35.0 
Swedish Select..........-..--.-| 134 | July 8] July 31 32 41.9 2,119 32.5 
Late: | 
WihiteLartarian teas. Joes 300 | July 11 | Aug. 9 | 34 34.8 | 2,538 34.0 
1 Not grown in 1909, 1910, and 1911. 
