Freezing Injury of 
Seed Corn 
37 
Table 6 — Effect of freezing temperatures on germination of 
corn differing in moisture content (1913 and 191 If ) 
Temperature range 2 to 20° F. 
Moisture 
range 
Moisture 
in grain 
( 
Normal 
grain 
lerminatii 
Frozen 
grain 
on 
Ratio 
of normal 
to frozen 
Ice 
observed 
in grain 
Embryos dark 
or light 
Per cent 
Per cent 
Per cent 
Per cent 
79.0 
100 
0 
100:0 
* 
Dark 
in +/-W QO 
76.5 
100 
0 
100:0 
* 
Dark 
( o to Ov . . 
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 . . 
-i 
; 58.6 
100 
0 
100:0 
% 
Dark 
l 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 
100:6 
45 to 50 
/ 49.6 
100 
25 
100:25 
Ice 
* 
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 
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. 
