OAT VARIETIES FOR THE CORX BELT 
23 
49.30 bushels, as compared with 45.66 bushels for the home-grown 
varieties. The mean yields of the logren as compared with those 
of the Green Eussian and lowar, based on the individual data from 
the separate farm 
tests, are 
graphically 
ures 14 and 
shown 
in Fig- 
15. 
eo 
/' 
X 
, 
/. 
/ 
y 
'-/' 
— / 
/v 
.-'^ 
\7/ 
/ 
1 
1 
1 
RATE-OF-SEEDING 
EXPERIMENTS 
During the vears 
1917 and 1920 to 1923, 
inclusive, logren was 
g r o AY n in rate-of - 
seeding experiments. 
The annual and aver- 
age yields are pre- 
sented in Table 17. 
From the data pre- 
sented in Table 17 it 
is evident that the 
heavier rates of seed- 
ing p r o d u c e d the 
highest yields. Three 
bushels per acre has 
been considered the standard rate. In two of the five trials 
with logren this rate has given the highest vield. In the other three 
trials higher rates have given higher jdelds. The results so far 
obtained would indicate that the rate of seeding might profitabty be 
increased to 4 bushels per acre. 
/OG/5/Eyy JS.OO 37./7 ^6.S7 Sa6S -5^/4^ .56.30 T^.OO 
&eSSA/ /PCiSS/!^/^ ZO.OO 29.60 .37..50 <^7.2S ,53.60 66.90 7S.OO 
Fig. 14. — Diagram showing the mean acre yields (in 
bushels) of "logren as compared with those of Green 
Russian as a standard oat variety in 25 trials on Iowa 
farms in 1922 and 1923 
Table 17. — Animal and average acre yieUJi^ {in 'bushels) of the logren oat 
grown in rate-of-seeding experiments at the loira Agricultural Experiment 
Station during the five years, 1917 and 1920 to 1923, inclusive 
Rate of seeding per acre 
Year 
2 
bushels 
2^4 3 
bushels bushels 
3H 
bushels 
4 
bushels 
4^2 
bushels 
1917 
1920 
1921 
1922 
1923 
Average 
56.9 
75.0 
35.8 
49.4 
75.3 
56. 9 1 56. 9 
81. 6 '. 85. 
38. 4 1 37. 1 
51. 2 i 52. 2 
75. el 79. 4 
58.1 
80.0 
37.2 
53.7 
76.2 
68.1 
82.5 
44.0 
52.8 
77.8 
71.9 
76.9 
38.6 
55.6 
76.9 
58. 5 
60. 7 62. 1 61. 
65.0 
61.0 
YIELDS OF OTHER VARIETIES AT THE IOWA STATION 
To present more fully the behavior of the new oat varieties, Al- 
bion, Richland, lowar, and logren, described in this bulletin, it is 
desirable to show data on the j^elding power of other early, midsea- 
son, and late varieties at the Iowa Agricultural Experiment Sta- 
tion. Therefore, the annual and average 3'ields of the varieties which 
have been groAvn continuously since the inclusion of the Albion and 
Richland in the varietal tests at Ames in 1911 are shoAvn in Table 18. 
