NORTH CENTRAL IOWA PIONEER HI-BREDS 
1. PIONEER HI-BRED 322. Pioneer Hi-Bred 322 yielded, in 
one of the worst drought seasons in the history of the corn 
belt, 69.31 bushels per acre in the 1936 “Iowa Corn Yield 
Test.” This was the highest yield in any of the twelve 1936 
Yield Test districts for both the regular hybrid and open pol¬ 
linated divisions. 
In the 1936 drought stricken fields. Pioneer 322 exhibited 
its ability to maintain good appearance even in adverse condi¬ 
tions, looking very dressy, throughout the dry spell, in its 
deep green foliage. 
This Pioneer hybrid proves to be an outstanding seed for the 
North Central territory. While going through three years of 
rigid testing, it showed exceptionally high afi around quality. 
With the advantage of strong roots, and sturdy stalks, it 
stands up excellently under storm and drought conditions. 
2. PIONEER HI-BRED 315. Yielding 124 per cent of the aver¬ 
age of open pollinated corn. Pioneer 315 holds, in North Cen¬ 
tral Iowa, first place honors in yield for all hybrids having a 
two year average or over in the “Iowa Corn Yield Test.” 
The Agricultural Experiment Station at Ames described 
it in the 1936 “Iowa Corn Yield Test” as “one of the out¬ 
standing combinations” having excellent performance records 
for yield and lodging resistance. 
Two other distinct features of the cross are its high germi¬ 
nating quality and strong shanks which prevent ear dioppage. 
“Cold and wet” germination tests show that it has unusually 
good resistance against cold, wet, planting conditions. 
3. *PIONEER HI-BRED 323. A winner of the Banner Trophy 
for highest yielding corn in the Iowa Corn Yield Test, Pio¬ 
neer 323 has an average yield increase of 14.5 bushels per 
acre over open-pollinated corn in our three year yield test 
taken in 1934, 1935, and 1936. 
It has medium sized ears, exceptionally strong shanks, loose 
husks, and is unusually easy to pick by hand. 
SOUTH CENTRAL AND SOUTHERN IOWA 
PIONEER HI-BREDS 
1. PIONEER HI-BRED 307. While going through four years 
of rigid preliminary testing, this hybrid stood up well in 
all weather conditions and demonstrated superior yielding 
ability. In a three year yield performance test Pioneer 307 
had an increased yield of 16.4 bushels per acre over open- 
pollinated corn tested under the same conditions, and in the 
1936 “Iowa Corn Yield Test,” it ranked among the top yield¬ 
ing hybrids for the South Central section. 
It has sturdy roots, exceptionally strong stalks, resistance 
against cold, wet springs, long, firm ears with loose husks 
which simplify mechanical and hand picking, and a beautiful, 
dark green appearance. 
2. PIONEER HI-BRED 314. This hybrid is another high yielder 
which made, in a four year performance test, excellent lodg¬ 
ing records in bad weather conditions. 
In a three year yield test made in the South Central Sec¬ 
tion, Pioneer 314 averaged 16.7 bushels per acre more than 
the average of open-pollinated corn tested under the same 
conditions. 
Pioneer Hi-Bred 314 has an exceptionally long ear with 
rather loose husks which make husking easier. Its cold re¬ 
sistance gives a strong, even stand under cold planting con¬ 
ditions. 
3. PIONEER HI-BRED 308. Pioneer 308 established, during 
several years of trial tests, a reputation as one of the highest 
yielding Pioneer hybrids on the market. 
Yielding, as an average of 1935 and 1936, 137.5 per cent of 
open-pollinated corn in South Central Iowa and 136.1 per cent 
of open-pollinated corn in the Southern section. Pioneer Hi- 
Bred 308 leads the hybrid division for all entries having a 
yield average of two years or more in the “Iowa Corn Yield 
Test” program. 
This particular Pioneer hybrid matures a few days sooner 
than Pioneer 305-A, and produces large ears which stay on 
the stalks because of strong shanks. 
4. PIONEER HI-BRED 308-D. The long husks which keep the 
ear tips from sticking out are the outstanding feature of this 
hybrid. 
This hybrid’s percentage of dropped ears is very low be¬ 
cause of its exceptionally strong, short shanks. 
Its yield record, lodging performance, and period of matur¬ 
ity are practically the same as Pioneer Hi-Breds 307 and 314. 
The stalks tend to have two ears medium in size, soft ker- 
neled, and high in food value, making the corn excellent for 
feeding purposes. 
5. ^PIONEER HI-BRED 311. Stiff, strong stalks anchored by 
heavy roots are the outstanding qualities of Pioneer 311. 
The period of maturity is shorter than that of 311-A, and 
can be grown farther north as illustrated by the maps. 
In yield tests conducted during 1934, 1935, and 1936, it 
yielded 119 per cent of the average of open-pollinated corn. 
Firm, solid ears, loose husks, and strong shanks which pre¬ 
vent ear dropping make it easy to harvest. 
6. * PIONEER HI-BRED 311-A. State Corn Husking contests 
are held in fields of champion hybrids. That is the reason why 
the 1937 Iowa Corn Husking contest was held in a field of 
311-A. Pioneer 311-A possesses sturdy stalks, good roots, 
and firm, medium sized ears which are easy to husk by hand. 
Its percentage of dropped ears before harvest is very small. 
Its high yielding ability under good conditions is due in part 
to the fact that it tends to have two ears to a stalk. 
In the last five years, 311-A has averaged 20 per cent or 
more increased yield over open-pollinated corn in BOTH the 
South-Central and Southern sections of the Iowa Corn Yield 
Test. It was about 10 per cent drier than local corn and had 
unusually good lodging resistance. 
7. PIONEER HI-BRED 305-A. Because of its superior quality 
in all characteristics. Pioneer 305-A, displaces, in the Southern 
Section of Iowa, the old Pioneer 306 which formerly was used 
in this territory. 
In a three year yield test, the new hybrid performed among 
the top ranking yielders. It has large roots, stiff, straight 
stalks, cold resistance, a leafy, dark green appearance, and 
strong resistance against cinch bugs. 
CONCLUSION 
This year, the new hybrids are being produced on a large 
scale for planting in 1938. The production of Pioneer Hi- 
Breds 323, 311, and 311-A will be continued, since a large 
number of farmers have had success with these hybrids and 
prefer using them. 
In order to test for yourself the qualities of each new cross, 
it might be well to divide your orders into two or three dif¬ 
ferent Pioneer Hi-Breds recommended for your location. You 
may like one better than another, depending upon your prefer¬ 
ence for the different characteristics. You may also discover 
that one cross does better than another under certain weather 
conditions. In this case, if more than one Pioneer Hi-Bred 
is planted, you will get an above-average crop each year. 
Diversification is good business. 
’Older line of Pioneer Hybrids. 
PIONEER HI-BRED CORN COMPANY 
DES MOINES, IOWA 
