OAT VARIETIES FOR THE CORX BELT 
19 
In the 153 comparisons of lowar with Albion there was an average 
gain of 6.81 bushels per acre in favor of lowar. For the 42 and 33 
comparisons with Richland and Kherson the average gains in favor 
of lowar were 6.39 and 5.35 bushels, respectively. In the weighted 
average lowar exceeded the home-grown varieties by 5. 77 bushels 
per acre. Comparisons of the mean yields of lowar with Kherson, 
Albion, and Richland, based on the individual data from farm tests 
which are not presented in this bulletin, are shown graphically 
in Figures 10, 11, and 12. The popularity and rapid distribution 
of lowar are evidenced by the fact that, as previously stated, more 
than three - fourths 
of a million acres ^° 
were devoted to it in 
Iowa alone in 1924. eo 
RATIO OF GRAIN TO 
STRAW 
70 
The lowar oat 
yields not only more 
grain but also more 
straw than other 
early strains like Al- 
bion and Richland. 
The average height 
of straw of the varie- 
ties, as given in 
Table 12, is evidence 
of this fact. In ad- 
dition, data obtained 
during the five-year 
period from 1918 to 
1922, inclusive, when 
the lowar oat was 
used on the soil- 
fertility field at the 
Iowa station, show 
that it produced a 
higher proportion of 
straw to grain than the Albion on the same field during the preced- 
ing three-year period. The average acre yields and the proportion 
of grain to straw on 59 soil-fertility plats at the Iowa station for the 
five years from 1918 to 1922, inclusive, were 1,638 pounds of grain 
and 1,612 pounds of straw, or about 50 per cent of each, respectively. 
Table 14. — Annual and average acre yields {in 'bushels) of the loicar oat c/raioi 
m rat e-of -seeding experiments at the Iowa Agricultural Experiment Statian 
during the five years 1917, 1918, 1920, 1921, and 1922 
'*0 
. 
/ 
/ 
/ 
/ 
/ 
/ 
/ 
'/ 
> 
/ 
Y 
/' 
■7 
-' 
7 
/ 
1 
1 
1 
1 
1 
1 
1 
/OAf^^^ Z5.00 30.00 <2C7.72 S/.73 e^68 7S.60 8IJ7 
^^^/O/V r7.5Q 26 .4S 36. 09 'fS./S ^4:97 &3./Z 77.IO 
Fig. 11. — Diagram sh-Owing- the mean acre yields (in 
bushels) of lowar as compajt-ed with those of Albion as 
a standard oat variety in 153 trials on Iowa farms 
during the five-year period from 1919 to 1 923, inclu sive. 
Rates of seeding per acre 
Year 
2 
bushels 
bushels 
3 
bushels 
34 
bushels 
4 
bushels 
bushels 
1917 - 
87.5 
55.6 
80.6 
39.8 
77. 5 
91.2 
58.7 
79.4 
48.4 
83.1 
97.5 
53.7 
85.0 
51.6 
78.1 
102.4 
58.1 
86.9 
55.1 
80.0 
109.4 
55.0 
86.2 
57.6 
80.0 
110.0 
1918 
58.1 
1920. 
78.7 
1921 
1922... 
48.4 
83.1 
.\verage 
6S.2 
72.2 
73.2 
76.5 
77.6 
75.7 
