OAT VARIETIES FOR THE CORN BELT 
13 
farm tests is shown o:raphicallY in Fio^ure 
the ^presentation of these data in detaiL 
Sjjace does not permit 
Table 7. — Annual average and weighted average yields of the Richland and 
Kherson oaf varieties groioi on JjS Iowa farms during the five-year period 
from lOl-'f to 191S, inclusive 
Year 
Number of 
trials 
Acre yield of grain (bushels) 
Richland 
Kherson 
Difference 
1914 
6 
9 
13 
16 
2 
51.81 
57.87 
48.51 
64.36 
52. 22 
46.54 
51.57 
47.91 
65.01 
65.23 
5.27 
1915 
6.30 
1916 
1917 
.60 
.65 
1918 . 
13.01 
Weighted average of all trials 
46 1 56. 45 
55. 15 
1.30 
The Richland also was compared with a number of other home- 
groAvn varieties, 195 such comparisons being made. The varieties 
and number of trials in which each was compared with Rich- 
land were as follows: Early Champion 18, Silvermine 14, Swedish 
Select 20, Green Russian 29, Kherson 46, miscellaneous 36,. and un- 
known 32. The average annual and weighted average A^ields in 
bushels per acre of the Richland and of the home-grown varieties, 
with their differences, are shown in Table 8. 
Table S. — Average yields of Richland and other common varieties of oats 
grown on 195 loiva farms during the five-year period from 1914 to 1918, 
inclusive 
Number of 
trials 
-\cre yield of grain (bushels) 
Home-grown varieties 
Home- 
Richland grown 
variety 
Difference 
18 
14 
20 
29 
46 
57.19 
59.18 
41.77 
48. 98 
56. 45 
5L56 
54.84 
39.22 
46.90 
55.15 
50.49 
52.32 
5.63 
Silvermine 
4.34 
Swedish Select 
2. 55 
Green Russian. . _ . .. _._ .. ... ...... 
2.08 
Kherson. . 
1.30 
Aliscellaneous varieties 
36 52. 67 
32 54. 91 
2.18 
Unknown varieties 
2. 59 
Weighted average of all trials 
195 
53.15 
50.61 
2.54 
From the data shown in Table 8, it will be seen that on the average 
Iowa farm Richland has exceeded the home-groAvn varieties in 
average yield from 1.3 to 5.6 bushels per acre. 
COMPARATIVE YIELDS OF RICHLAND AND ALBION 
EXPERIMENTS AT THE IOWA STATION 
A comparison of the annual and average yields of Richland and 
Albion at the Iowa Agricultural Experiment Station is presented 
in Table 9. 
