
MASTER HYBRID F-101A 
(110-114 Days) 
Page 68 

MASTER F-21 for zones A & B 
A great favorite in Northern Zones of Minne- 
sota, North Dakota, Wisconsin, Michigan, Mon- 
tana, and similar early territories. One of the 
earliest hybrids on the market. In official Minne- 
sota Yield Trials (Northern Zone) produced over 
54 bushels per acre, with a plus 7.4 index of per- 
formance, an outstanding record! A plus index 
indicates degree of superiority, over the average 
of recommended hybrids for the zone. (See table 
below.) In 5 years of testing, this hybrid averaged 
53.7 bu. per acre. Five-year avérages show only 
1% smut, plant height 77 inches, ear height 29 
inches, ear length 7 inches, 14 to 16 rows, only 1% 
root lodging, 1% broken stalks. Easily harvested 
with mechanical picker. Produces bright, sound, 
deep yellow ears with golden bronze tinge. Loose 
husk at picking time, makes for clean harvest. High 
feeding value. Performs well on peat or muck 
soils. Popular for hogging off in Southern Zones, 
Performance in Official State Trials: 
Test ee Rank 
Minnesota, Northern 
Zone, 2-Yr. Average |54.35|Plus 7.4 Index 
Michigan, Northern j 
Zones 6 and 7, 2-Yr. Highest yield of all 
Average 51.8 |hybrids tested 
North Dakota, North- 
eastern Area (Grand EY) A 
Forks County), 5-Yr. Significantly highest 
Average 45.9 |yielding group 
North Dakota, West- 
arn =Area (Burleigh s 
County) 2-Yr. .Av- Significantly highest 
erage ; 42.3 |yielding group 
No. Dak, East Cen- ; : , 
tral Area, Cass Co. 2- Significantly highest 
Yr. Average '46-’47 |54.4 |vielding group 
South Dakota, Black 
Hills Area, Lawrence 
Co. 2-Yr. Average 
Ca 
MASTER F-31 for zones C&D Days 
This hybrid matures in about 87-91 days in the 
Northern Corn Belt. It gives strong germinating, 
vigorous, early growth which gets it ahead of weeds 
in the event of a cold, wet spring. It responds well 
to a thick rate of planting for maximum yields. 
The deep roots make good wind resistance on this 
hybrid and ears are borne at a convenient height 
for harvesting. 
The tips of the ears are characteristically well 
filled, a feature common in drought-resistant corns, 
ars are typically about 8 inches long with 14 to 
16 rows of wide, deep, thick, medium dent kernels 
like Minn, No. 13. The kernels have plump tips 
and a high test weight per bushel, often as high 
as 60 lbs. This hybrid dents rapidly in the fall 
and dries quickly to permit safe early cribbing. 
Since this is a brand new hybrid, official state yield 
trial data is not yet available. Our trials show 
57.8 bu, per acre, plant height 85 inches, ear height 
30 inches. reer 
MASTER F-41 for zone D&E Days 
A new yellow dent hybrid, tailor-made for Min- 
nesota’s North Oentral Zone and similar areas in 
North Dakota, Wisconsin, Michigan, and South 
Dakota. Trials show this hybrid superior to Mas- 
ter F-40 in yield and lodging resistance. Note 
outstanding official performance in table below. 
Two-year averages in our trials show 71.4 bu. per 
acre, only 1% smut, plant height 87 inches, ear 
height 84 inches, only 1% root lodging, no broken 
stalks, ear leneth eight inches, and 16 rows. Har- 
vests easily with mechanical picker, Sound, rich 
yellow ears, with deep kernels, and a small cob, 
with high shelling percentage. An excellent feeding 
corn, Performs well on peat soils, ideal for hog- 
ging off in more southern sections. 
Performance in Official State Trials: 










57.9 |High yield 

ASTER HYBRIDS for 1949 
Master Hybrids are bred, produced, tested in Minnesota to insure fitness for North- 
ern climates. Below we give you only FACTS. We quote yields from unbiased 
OFFICIAL STATE TRIALS, conducted by State Experiment Stations—not from 
private tests! (In Minn. State Tests, a plus index shows degree of superior perform- 
ance over the average of recommended hybrids.) 
See Blue Figure Price List in front of catalog 

MASTER F-60A for zones E & F CA 
Days 
A new improved model of the famous old Mas- 
ter I-60. After extensive tests, with inbred com- 
binations, this hybrid’s superiority stood out 
prominently. It really ‘‘strikes the eye’’ with 
its beautiful field appearance. Deep green plants 
with long, showy-type ears. Adapted to the Cen- 
tral Zones of Minnesota, Wisconsin, Michigan, 
South Dakota, and southeastern North Dakota. 
Tests show only 2% smut, plant height 90 inches, 
ear height 85 inches, no root lodging, 1% 
broken stalks, ear length 8 inches, 16 to 20 rows. 
Absolutely free from ear rots, with deep kernels 
of highest feeding quality. Well adapted to me- 
chanical harvest. 
In our 1946 trials, Master F-60A made a record 
98.1 bushels per acre, outyielding all other hybrids 
of similar maturity! Averaged 84.6 bu. per acre 
in 2-year trials, 
Performance in Official State Trials: 
Acre 
Test Viela Rank 





Michigan, Huron 
County (1946) 
Michigan, Montcalm 
County (1946) 
104-108 
MASTER F-82 for zones E & F Days 
A most popular hybrid in South Central Zones 
of Minnesota, Wisconsin, Michigan, South Da- 
kota, extreme southeastern North Dakota, and 
Similar areas. Our four-year averages show 72.7 
bu. per acre, only 1% smut, plant height 99 
inches, ear height 41 inches, 1% root lodging, 1% 
broken stalks, ear length 8 inches, 16 rows. 
Pleasing uniformity of plant and ear characters. 
Plants of rich dark ereen, with attractive ears 
packed with richly colored, thick dented kernels, 
high in feeding value. Easily harvested -with 
mechanical picker. A favorite with our customers 
everywhere in the 105-day class. 
Performance in Official State Trials: 
Test Rank 
69.3 |High yield 
Significantly highest 
yielding group 

61.9 | 

Minnesota, South 
Central Zone,  3-Yr. 
Average 
Michigan, Saginaw 
Index plus .4 
Significantly highest 
yielding group 

County, 4-Yr. Aver. 
Michigan, Huron 
County (1946) 
South Dakota, Grant 
County (1946) High yield 
110-114 
MASTER F-101A ‘axis ("Bai 
A new improved model of the famous old Mas- 
ter F-101, selected after extensive tests with 
many inbred combinations. New F-101A is earlier 
than F-101, and superior in standing ability, at 
the same time retaining all the excellent qualities 
of the famous F’-101. 
1944 to 1947 averages show no smut, plant 
height 98 inches, ear height 41 inches, no root 
lodging, 1% plants broken, ear length 9 inches, 18 
rows. Our own extensive trials show yields equal 
to F-101. In our 1946 trials, Master F-101A made 
a record of 95.1 bushels per acre! Showed a two- 
year average of 91.8 bu. per acre! Customers who 
reported such pleasing performance with F-101 
should try new F-101A for its beautiful field ap-= 
pearance, earlier maturity, improved standability, 
excellent seedling vigor, quick drying, excellent 
keeping qualities, and ease of mechanical harvest, 
ars when ripe do not hang down and fall off, due 
to a very short, strong shank, 
Performance in Official State Trials: 
Test 


High yield 






Rank 

Michigan, Monroe 
County, 2 years 69.0 |High yield 



Test Zu told Rank 
Michigan, Sanilac 
County (1946) 
Michigan, Montcalm 
County (1946) 
North Dakota, Rich- 
land County (1945) 







Significantly highest 
45.4 |yielding group 
Significantly highest 
61.5 }yielding group 
Significantly highest 
41.0 lyielding group 






Michigan, Kalamazoo 
County, 2 vears 
(1945 & 1947) 70.0 |High yield 
Towa, Northern Sec- x é 
tion, Winneshiek 4.7% higher yield than 
County—1947 47.55\average of all tested 
Towa, Sioux County— 1.3% higher yield than 
1947 164.35 average. of all tested 










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