THEIR DESCRIPTION 
LISTED IN ORDER OF MATURITY 
Pioneer 352 . . . 
Medium-size, wide grained ear with high shelling 
percentage — early maturing — outstanding yielder — 
strong rooted—heavy stalked—yielded 118% of open- 
pollinated com averages in 1937 Pioneer tests and 
made unusually good lodging grades. 
Pioneer 350 . . . 
Exceptionally high yielding early strain—medium 
stalk height—good lodging resistance—each stalk has 
tendency to grow two high quality, rich colored ears 
that have long husks. 
Pioneer 349 . . . 
Highest yielding PIONEER hybrid for Northern Sec¬ 
tion—first year in commercial production—leafy stalks 
—good lodging and drought resistant—may show a 
weakness for smut. 
Pioneer 335 . . . 
Vigorous, broad-leafed, short stalked plant — supe¬ 
rior yielding ability—low ears—very cold resistant— 
heavy roots—stiff stalks—best region is second and 
third row of Iowa Counties from Minnesota border. 
Pioneer 322-A . . . 
General-purpose strain—produces rough ears of 
good diameter—deep kerneled—carries ears at me¬ 
dium-low height — sound yielding — highly smut re¬ 
sistant — quite similar in general characteristics to 
PIONEER 322. 
Pioneer 324 . . . 
Good size, moderately smooth, starchy ears—highly 
disease resistant—ears of convenient height for hand 
picking—rigid stalks—hardy roots—strong shanks that 
hold their ears—shucks which loosen in the fall—ideal 
for picking. 
Pioneer 321 .. . 
Exceptionally good quality grain—large, rough, mod¬ 
erately starchy, rich colored ears—quite stiff stalked— 
attractive plant appearance—yields about the same as 
PIONEER 322. 
Pioneer 330 . . . 
Extremely uniform, dressy looking hybrid — every 
plant is the same size and every ear looks alike—high 
yielding performance—superior lodging grade—low ear 
height—rough, deep grained, starchy ears. 
Pioneer 329 . . . 
Highest possible quality of marketable corn—low ear 
height—strong, healthy roots—firm, stiff stalks—coarse 
grained ears—averaged a yield of 139% of open-pol¬ 
linated com in a two-year PIONEER test. 
Pioneer 328 . . . 
Very smut resistant — medium size, uniform, good 
quality ears—moderately starchy grain—low ears— 
very good yielder. 
Pioneer 316 . . . 
Firm, heavy ears of medium size—good husk protec¬ 
tion—excellent cold, drought, and lodging resistance— 
convenient ear height—performed consistently well in 
South-Central and Southern Sections of 1937 Iowa Com 
Yield Test—yielded 100.33 bushels per acre in District 
9 and had no dropped ears. 
Pioneer 312 . . . 
High yielding hybrid — placed in top division of 
Southern Section in 1937 Iowa Corn Yield Test—in 
District 12. it yielded 7.51 bushels per acre more than 
the average of all hybrid entries, showed low per¬ 
centage of damaged seed, and had a good lodging 
grade—moderately smooth ears—somewhat starchy 
kernels — good quality corn — long husks — smut and 
drought resistant. 
Pioneer 319 . . . 
Highly resistant against smut, cold, and drought— 
very high yielding—sound quality corn—superior lodg¬ 
ing records—long husks that loosen in the fall. 
Pioneer 313 .. . 
Averaged 145% of open-pollinated corn in 1937 PIO¬ 
NEER tests—stands up well—strong smut, cold, and 
drought resistance—no fallen ears—long husks—large, 
showy, rich creamy colored ears—dark green leaves. 
Pioneer 305-A . . . 
Latest maturing PIONEER hybrid—adapted to ex¬ 
treme Southern Iowa—heavy leafage with dark green 
color—big ears that shell out well—withstands drought 
and chinch bugs. 
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