THEIR DESCRIPTION 
LISTED IN ORDER OF MATURITY 
Pioneer 355 . . . 
Extra early maturing—cold resistant—good yielding 
—satisfactory lodging resistance—medium-low eared 
—longer ears than open-pollinated strains grown in 
Northern Section—strong shanks that hold ears on stalk 
—very easy to pick—faithful standby in Northern Iowa 
for many years. 
Pioneer 357 . . . 
Early com—high yielding ability—strong roots—stiff 
stalks—smut resistant—medium length shanks—leafy 
plants—ears about waist high and well covered with 
husks—practically no damaged grain—very practical 
PIONEER cross for Northern Iowa. 
Pioneer 323 . . . 
Two-eared variety — kernels well dented and dry 
quickly in the fall—medium height—very few dropped 
ears—loose husks—ideal for hand picking—BANNER 
TROPHY winner in 1929. 
Pioneer 322 . . . 
The outstanding hybrid in the 1937 Iowa Corn Yield 
Test —won the BANNER TROPHY —Iowa Corn Yield 
Test report stated, "This combination stood up well, 
dropped few ears, and had lower than average per 
cent of damaged kernels"—sturdy, vigorous stalks and 
long, deep roots—drought and smut resistant—low 
ears—short shanks—medium size, moderately rough 
ears—long husks—high shelling percentage—hard to 
beat as practical, all-around hybrid. 
Pioneer 315 .. . 
Medium-large ears—contains high percentage of oil— 
strong shanks—high yielding—in North-Central Section 
of Iowa Com Yield Test, it stands at top of all hybrids 
with a three-year yield record, averaging 121.9% of 
open-pollinated strains—BANNER TROPHY winner in 
1935—one of the best cold resistant hybrids on the 
market—germinates vigorously under cold, wet plant¬ 
ing conditions. 
Pioneer 311 .. . 
Stiff, strong stalks well anchored by heavy roots— 
firm, solid ears—strong shanks practically eliminate 
ear dropping—may smut a little in dry years—loose 
husks permit rapid drying in the fall—ideal to pick 
by hand or machine. 
Pioneer 311-A . . . 
Often produces two ears to a stalk—satisfactory 
yielding ability — stands up well — practically no ear 
dropping—may show a tendency to smut in dry years 
—firm, medium size ears—dries rapidly in the fall— 
easy to pick—1937 Iowa Corn Husking Contest held in 
field of 311-A. 
Pioneer 318 .. . 
Large, coarse, starchy ears—deep roots and sturdy 
stalks—good quality corn—ears hang waist high—long 
husks—small per cent of grain damage—strong shanks 
keep ears from falling—excellent appearance in the 
field. 
Pioneer 308-D . . . 
Two-eared stalks — medium-leafy plants — has good 
feeding value—high shelling percentage—stands up 
well—excellent silage and fodder com—high yielding 
—averaged a yield of 139% of open-pollinated corn 
in a four-year PIONEER test—well adapted to mechan¬ 
ical picking. 
Pioneer 314 . . . 
General purpose, one-eared variety—large, medium- 
rough ears—shells out well—strong shanks—cold and 
drought resistant—quite good lodging records—rather 
loose husks that permit quick drying in the fall—easy 
husking—outstanding yielder—won first place in Dis¬ 
trict 8 of 1937 Iowa Corn Yield Test by yielding 8.42 
bushels per acre more com than the average of all 
hybrid entries. 
Pioneer 307 . . . 
Excellent general-purpose hybrid for southern half 
of Iowa—produces long ears at desirable height— 
practically no fallen ears—excellent resistance against 
cold, smut, and drought—abundant foliage for silage 
and fodder—fairly loose husks—equally suitable for 
hand and mechanical picking—adapted to all soil con¬ 
ditions—exceptionally high yielding—superior lodging 
resistance — ranks first in yield and lodging grade 
among all hybrids with a two-year record in Southern 
Section of Iowa Corn Yield Test—averages a yield of 
138.7% of open-pollinated varieties for both South-Cen¬ 
tral and Southern Sections of the Iowa Corn Yield 
Test. 
Pioneer 317 .. . 
Good all-around com — vigorous, medium-height 
plant—medium-low ear-height—long, heavy ears— 
sound quality corn—long husks—strong shanks—supe¬ 
rior standing ability—smut resistant—high yielding 
com—showed up exceptionally well in South-Central 
and Southern sections of 1937 Iowa Corn Yield Test— 
yielded 101.89 bushels per acre in District 12. 
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