8 
BULLETIN 1343, U. S. DEPAETMENT OF AGEICULTUEE 
power of the two varieties as indicated by the mean yields from the 
66 comparative tests is shown graphically in Figure 6. Space does 
not permit the presentation of the detailed data from these experi- 
ments. 
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FiG. 6. — Dia^-am. slio\^ang' the mean acre yields (in bushels) of Albion as compared 
with those of Kherson as a standard oat variety in 66 trials on, Iowa farms during 
the 5-year period from 1913 to 1917, inclusive. 
Table 3. — Annual average and iceighted average yields of the AVbvon and Kher- 
son oat varieties grown on 66 Iowa farms during the five-year period from 
1913 to 1917, inclusive 
Year 
Number of 
trials 
Acre yield of grain (bushels) 
Albion 
Kherson 
Difference 
1913 
12 
6 
15 
21 
12 
49.84 
47. 58 
60.71 
49.73 
61. 15 
46.88 
43.95 
58. 23 
46. 17 
58.66 
2.96 
1914 - _ - . 
3.63 
1915 
2.48 
1916 
3 56 
1917 ♦. 
2.49 
Weighted average of all trials 
66 
54. 13 
51.11 
3.02 
Albion also was compared in a similar way with several other 
varieties on Iowa farms, altogether 267 trials being conducted 
during the five years from 1913 to 1917, inclusive. The summarized 
