CORN LODGING AND COLD RESISTANCE 
LODGING . . . 
Up-Rooting and Stalk Breaking 
Up-rooting and stalk breaking are two com¬ 
mon types of corn lodging. 
Up-rooting usually occurs in late July when 
rain is accompanied by heavy wind. Worms 
and disease, however, can cause root lodging 
at any time during the growing season. Stalk 
breaking ordinarily does not appear until Octo¬ 
ber or November after the plants have dried 
out. 
All PIONEER hybrids recommended for com¬ 
mercial growing have been thoroughly tested 
and proved resistant to both root lodging and 
stalk breaking. Observations are made for 
both types of lodging in July and again in Oc¬ 
tober after the corn has ripened. 
Lodging percentages listed in the Lodging 
Columns of Pages 4 and 8 illustrate the relative 
lodging records of PIONEER hybrids as com¬ 
pared with a superior hybrid recommended as 
the best all-purpose PIONEER hybrid that can 
be supplied in quantity to each respective Sec¬ 
tion of Iowa for the 1939 growing season. 
Hybrids with lower lodging percentages do 
not lodge as much as those having higher per¬ 
centages. For example, the lodging percent¬ 
age of PIONEER 355, which is 99% of PIONEER 
357, means that PIONEER 355 has 1 % fewer 
fallen plants than PIONEER 
357. Notice the high per¬ 
centage of lodged open- 
pollinated corn as com¬ 
pared with the base hybrid 
of each Section. 
Heavy-rooted, sturdy 
stalked PIONEER hybrid 
corn withstands adverse 
weather conditions and 
makes both hand and me¬ 
chanical picking easier. 
COLD RESISTANT HYBRIDS . . . 
A cold, wet spell in early spring after corn 
is planted often causes low germination. A 
poor stand results. A poor stand means less 
yield and reduced yield means less profit. 
Cold resistant PIONEER hybrid seed corn 
makes farmers more certain of getting a good, 
even stand under cold, wet planting conditions. 
For several years, PIONEER has experi¬ 
mented with cold resistant corn. Each spring, 
cold resistant hybrids are planted for germina¬ 
tion tests during the month of March. In 1938, 
cold resistant PIONEER hybrids, planted 
March 18, went through an early April snow 
storm and several hard freezes. What a severe 
test 1 . Yet these cold resistant hybrids showed 
strong, vigorous germination. By April 20, the 
best ones had produced a stand of 85% which 
equals the average stand of open-pollinated 
corn under favorable conditions. 
The impressive results of this test prove the 
practical value and importance of cold resist¬ 
ing PIONEER hybrids to corn growing. Cold 
resistant corn planted in the cornbelt during 
the month of April germinates strongly and 
produces a good stand, but, unless the early 
spring weather is ideal, it does not necessarily 
yield any more or mature much earlier than 
corn planted during the first part of May. 
Ask PIONEER representatives for proved 
and tested, cold resistant, reliable germinating 
PIONEER hybrids. Reduce 
the chances of a poor 
stand. 
Several cold resistant 
PIONEER hybrids are avail¬ 
able for each of the four 
Sections of Iowa. The hy¬ 
brids outstanding for cold 
resistance and obtainable 
for 1939 planting are PIO¬ 
NEER 355, 335, 315, 323, 
307, and 314. 
PLANTED MARCH 20 
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