PIONEER 
announces twenty-seven superior com hybrids for 
1939 commercial planting. Twelve hybrids are available in quantity and only lim¬ 
ited amounts of the other fifteen hybrids can be obtained. The hybrids obtainable 
only in limited amounts are relatively new combinations whose short records indi¬ 
cate unusual promise. PIONEER recommends their use only in limited quantity 
until their long-time consistency can be fully established by actual commercial 
planting. 
PERFORMANCE TESTED . . . 
Every hybrid has been thoroughly tested for 
yield, maturity, standing ability, and strong 
germination. PIONEER carries on a complete 
program of scientific corn performance testing. 
PIONEER performance tests are hand- 
planted, harvested, and computed with the 
same accurate methods used in the official 
State Corn Yield Tests. Over 100 such PIONEER 
test plots dot the cornbelt every year. 
GENERAL DESCRIPTION . . . 
All PIONEER hybrid seed corn is: — truly 
hybrid; thoroughly tested for maturity, yield, 
quality, and lodging resistance; yellow in color; 
picked early in the fall; carefully ear-sorted and 
tipped; immediately kiln dried to 12 per cent 
moisture; shelled; graded into 
four uniform kernel sizes; treated 
with mercury dust to insure vigor¬ 
ous growth in a cold, wet spring: 
healthy seed that germinates 95 
per cent or better; put up in 
sealed, trade-marked bushel bags 
that are marked with specific 
PIONEER hybrid brand numbers; 
ready for planting. 
UNIFORM GRADING 
PIONEER hybrid seed 
corn is graded accurately 
into four uniform kernel 
sizes. A specially built 
grading system removes all 
light, chaffy kernels, elim¬ 
inates tips, and leaves only 
strong, healthy seed. 
Two flat kernel sizes, large flat and small flat, 
are available. Planted 42 inches each way, 
three kernels per hill, the large flat size aver¬ 
ages 7 acres per bushel and the small flat ker¬ 
nels 8.5 acres per bushel. 
Two round kernel sizes, large round and 
small round, are obtainable and when planted 
42 inches each way, three kernels per hill, the 
large round size, put up in special bags hold¬ 
ing 65 pounds, plants about 7 acres per bag 
and the small round kernels average 8.0 acres 
per bushel. The kernel sizes, of course, vary 
from season to season, depending on crop con¬ 
ditions. 
PIONEER offers its customers complete 
planter plate recommendations for each kernel 
size for most widely-used makes of planters. 
LARGE FLAT 
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