Corn Investigations 
139 
No lodging was apparent until August 26 — four to seven 
days before the corn was ripe. On this date a very unusual wind 
of sixty miles per hour occurred, and another of sixty-five miles 
per hour on September 2. All three lots of corn withstood the 
windstorms about equally well. 
As a grand average for both varieties planted in both ear-to- 
row and composite tests, (1) the disease free ears yielded 50.2 
bushels, (2) the diseased ears yielded 50.6 bushels, and (3) the 
original untested seed yielded 49.7 bushels per acre. 
Table 58. — Summary showing field 'performance of disease free 
versus diseased corn as indicated by germinator test. ( Aver- 
age of tivo varieties and two methods of comparison.) 1921. 
Disease 
free 
Dis- 
eased 
Original 
Number of plats averaged 
222 
200 
51 
Number of seeds planted per plat 
330 
330 
330 
Stand 21 days after planting (per cent) 
85.6 
85.9 
85.2 
Weak plants 21 days after planting (per cent) . . . 
Number of plants per plat in fall (actual) 
2.6 
269.7 
2.9 
276.8 
2.5 
271.3 
Per cent stand in fall 
82.2 
83.4 
82.6 
Date tasseling 
7/19 
9/3 
107 
7/19 
9/3 
106 
7/19 
9/3 
107 
Date ripe 
Height of plants (inches) 
Suckers per 100 plants 
6.9 
8.7 
8.7 
Barran plants per 100 
7.5 
7.3 
7.8 
Lodged plants per 100 
84.1 
83.3 
83.5 
Ears per 100 plants 
92.8 
91.9 
92.4 
Shelling per cent 
83.5 
83.7 
83.4 
Shrinkage of ear corn (per cent) 
1.1 
1.1 
0.9 
Yield per acre (bushels) 
50.2 
50.6 
49.7 
These data are summarized from Table 57. 
In Table 59 the yields for the two varieties are so assembled 
as to compare the ten highest yielding ears selected for freedom 
from disease with the ten highest yielding ears selected as being 
badly diseased by means of the germinator test. The same com- 
parisons are also made for the ten lowest yielding ears of each 
group. It was thought that this manner of comparing extremes 
for the diseased and disease free selections should emphasize 
any detrimental effect of the disease. The averages for both 
varieties indicate that the best ten ears selected for freedom 
from disease yielded 1.8 bushel below the diseased, while the 
ten lowest yielding ears selected for freedom from disease 
yielded 0.3 bushel more than the diseased. 
