Nebraska Agricultural Exp. Station , Research Bui. 20 
34 
As an average for the two years 1914 and 1915, the average 
duration of shedding pollen by the individual plant was 0.0 
days. The silks first appeared 1.9 days after pollen was being 
shed, and fertilization first became apparent by the character- 
istic change in appearance of silks 3.6 days later, or 0.6 of a day 
before the shedding of pollen ceased. The pollen was being 
shed at the maximum rate 2.1 days before fertilization was ap- 
parent bv the change in appearance of the silks. Allowing 2.5 
days for the fertilization to become manifest on the silks, it ap- 
pears that the fertilizing pollen fell upon the silks within a day 
of the time when pollen was dropping at its maximum rate. 
Table 10. — Condition of silks at stated internals after pollina- 
tion. Hogue's Yellow Dent corn. 1021. 
i 
1 Condition of exposed portion of silks 
iiuui a 
after 
• General 
20 per cent 50 per cent 
75percent 100 per ct. 
applying 
slight 
Few silks 
of silks 
of silks 
of silks 
of silks 
pollen 
yellowish 
darkly 
darkly 
darkly 
darkly 
darkly 
at 5 P.M. 
discoloration 
discolored 
discolored discolored 
discolored discolored 
Per cent of plant* in condition indicated 
20 
o 
0 
0 
0 
0 
0 
24 
25 
0 
0 
0 
0 
0 
36 
26 
38 
2 
11 
0 
0 
42 
17 
13 
20 
15 
2 
0 
48 
14 
12 
47 
15 
8 
0 
60 
9 
10 
51 
12 
18 
0 
67 
3 
10 
38 
27 
19 
3 
72 
3 
28 
42 
22 
5 
91 
4 
21 
09 
53 
98 
1 
6 
18 
75 
114 
1 
9 
90 
120 
2 
98 
138 
100 
The data for columns 1 to 20 of Tables 6 and 7 are based 
entirely upon those plants which produced both silks and pollen. 
Plants with sterile tassels or barren of ears, as indicated in 
columns 21 and 22. were omitted in the other tabulations. Dur- 
ing the two years, 3.6 per cent of all the plants for the fourteen 
varieties proved to be barren of ears and 0.5 per cent had sterile 
tassels. 
\\ bile the average pollinating period for individual plants 
