Freezing Injury of Seed Corn 
37 
Table 6 — Effect of freezing temperatures on germination of 
com differing in moisture content (1913 and 19H ) 
Temperature range 2 i° to 20° F. 
Moisture 
range 
Moisture 
in grain 
Germination 
Ice 
observed 
in grain 
Embryos dark 
or light 
Normal 
grain 
Frozen 
grain 
Ratio 
of normal 
to frozen 
Per cent 
Per cent 
Per cent 
Per cent 
79.0 
100 
0 
100:0 
* 
Dark 
<7K QA 
76.5 
100 
0 
100:0 
* 
Dark 
i D tO oU . . 
75.9 
62 
0 
100:0 
Ice 
Dark 
75.7 
75 
0 
100:0 
Ice 
Dark 
Average. . 
76.8 
84.2 
0 
100:0 
73.5 
100 
0 
100:0 
* 
Dark 
70 to 75 . . 
70.6 
87 
0 
100:0 
Ice 
Dark 
70.2 
100 
0 
100:0 
* 
Dark 
Average. . 
71.4 
95.7 
0 
100:0 
65 to 70 . . 
68.8 
100 
0 
100:0 
Ice 
Dark 
60 to 65 . . 
/ 61.5 
100 
0 
100:0 
Ice 
* 
\ 60.4 
100 
0 
100:0 
Ice 
Dark 
Average . . 
61.0 
100 
0 
100:0 
f 58.9 
100 
0 
100:0 • 
* 
Dark 
55 to 60 . . 
< 
58.6 
100 
0 
| 100:0 
* 
Dark 
57.4 
100 
0 
100:0 
Ice 
Dark 
Average. . 
53.3 
100 
0 
100:0 
50 to 55 . . 
J 
f 53.9 
100 
0 
100:0 
Ice 
Dark 
1 
51.3 
100 
12 
100:12 
Ice 
Dark 
Average . . 
52.6 
100 
6.0 j 
100:6 
45 to 50 . 
J 
49.6 
100 
25 
100:25 
Ice 
* 
1 
45.1 
100 
0 
100:0 
Ice 
Dark 
Average . . 
47.4 
100 
12.5 ! 
100:12 
f 43.1 
100 
25 
100:25 
Ice 
* 
44.9 
100 
0 
100:0 
Ice 
Dark 
40 to 45 
42.4 
100 
37 
100:37 
Ice 
Dark and light 
jC \J tv iU . . 
42.0 
100 
0 
100:0 
* 
Dark 
41.7 
100 
0 
100:0 
* 
Dark 
41.0 
100 
12 
100:12 
Ice 
Dark 
Average. . 
42.5 
100 
12.3 
100:12 
*No observations made. 
