WHICH HYBRID FOR YOUR GROWING SEASON? 
APPROXIMATE MATURITY DIFFER- CONDITIONS AFFECTING 
ENCES AMONG PIONEER HYBRIDS MATURITY . . . 
Farmers should make certain they plant hybrid seed 
corn suited to their growing season. Hybrid corn must 
be properly adapted in maturity to give the best results. 
Late corn planted in northern sections is often caught 
by early frost unless the first damaging frost occurs 
very late in the fall as in 1937. Early corn raised too 
far south matures too quickly and a reduction in yield 
results. 
PIONEER does not recommend unadapted corn in 
any territory unless the purchaser wishes to plant it 
for some special purpose such as silage corn, early 
feeding corn, or to raise early maturing corn that will 
escape hot summer winds. 
Maturity records of PIONEER hybrids are based on 
the average moisture content of the corn about the 
middle of October. These tests are made in all parts 
of the cornbelt. Due to various conditions which affect 
the maturity of corn, estimated maturity differences 
given in the table will not always correspond with the 
actual maturity of PIONEER corn. However, under 
average weather and soil environment, maturity differ¬ 
ences among PIONEER hybrids as shown are accurate. 
Soil fertility, soil type, rain fall, and average temper¬ 
ature all play an important part in the maturity of corn. 
Rich, well balanced soil with the proper amount of 
moisture pushes the corn along faster, while low fer¬ 
tility soil holds it back. 
Farmers should plant corn to fit their local soil con¬ 
ditions. On rich ground, a later hybrid than is ordi¬ 
narily recommended for a region can often be grown 
to advantage, while an earlier hybrid than is ordi¬ 
narily recommended in a territory often gives the best 
performance on poor soil. 
Cold weather retards the growth of corn, while 
ideally warm temperature hastens it. Too much or 
not enough rain fall also greatly affects the length of 
time necessary for maturity. 
For the above reasons, the maturity period of any 
one hybrid varies somewhat from year to year. Even 
in the same season, a strain of corn planted in two 
different nearby locations will mature differently if the 
moisture and soil conditions show a variation. The 
map on Page 11 shows hybrids adapted to your location. 
Tjau can dtep&nA on fiA&p&i. niatusiity with 
NORTHERN 
SECTION 
N.C. 
SECTION 
355 
EARLIEST 
357 
352 
350 
349 
323 
335 
322 315 322-A 324 
321 
330 
329 
31 
311-A 328 
s.c. 
SECTION 
318 308-D 314 
307 
317 
316 
SOUTHERN 
SECTION 
312 
319 
313 
v 305-A 
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