44 
T. W. WOOD & SONS 
SDDDSMDN SINCE 1879 
RICHMOND, VIRGINIA 
HYBRID CORN INCREASES YIELD 25% 
Half the Acreage in Leading Corn States Now Hybrid 
ITj^brid Corn is replacing old corn varieties just as automobiles replaced the horse and buggy. 
Autliorities predict that within a few years practically all corn planted will be hybrid. The reasons 
adapted hybrids give increased yields of 20% to 30% over the best local varieties in experiment 
station tests and under actual farm conditions are: 
Deep Roots, Strong Stalks, Drought and Storm - Resistant. 
Disease-Resistant, Sound Ears, No Barren Stalks, Uniformity. 
The roots are so deep that a husky farmer offered $5.00 to pull up a single stalk was unable to do 
so. G. J. Mercherle, Bloomington. 111., harvested over ICO bushels of hybrid corn per acre during the 
1936 drought when his neighbors’ corn practically failed. 
The Old Com Breeding Method of selecting good seed ears increases yields very little as it does 
not control the pollen parent which fertilizes the ears. It is like mating superior female livestock to 
grade sires. 
Hybrid com is produced by crossing selected pure inbred lines. This greatly increases yields for 
the same reason a mule has more strength and endurance than its parents. 
An inbred line is produced by placing pollen from the tassel on the silks of the same plant, repeat¬ 
ing this operation for about five years. This is done by placing paper bags over the tassel and ear 
shoot before the silks appear. This self-fertilization concentrates in the offspring all good or bad 
inherited characters. Usualiy over 1,000 lines must be developed and tested to find four superior lines 
with deep roots, strong stalks, resistance to disease, and no undesirable characters. 
A commercial Double Cross Hybrid is produced by crossing two lines to form a single cross, and 
crossing two other lines in a separate field. The following year the two single crosses are combined 
in isoiated fields, planting one row of the pollen parent to three of the seed parent. All tassels in the 
three seed rows are pulled out before thy shed any pollen. The ears from detasseled rows furnish the 
hybrid seed. Because hybrid vigor only lasts one year new seed must be obtained each year to get the 
increased yield from hybrid corn. 
PRICES OF ALL HYBRID FIELD CORNS Plat Edge-Drop grain. 
By jtifl a l postpaid, i^uart 80c^ peck $1.25*^ peck $2.l5 j bushel $3,955 bushel $7.25. 
Not postpaid, Vz peck $1.00; peck $1.75; bushel $3.25; bushel $6.00; 5-bushel lots $5.75 per bushel. 
Wood’s Hybrid Yellow Dent 
still standing at Christmas. 
Docal varieties had fallen. 
Difference in root growth. Deft, open 
pollinated. Right, hybrid 
WOOD’S HYBRID EXTRA EARLY YELLOW DENT 
Heaviest Yielding Corn for High Mountains and Northern States 
Best Early Peed Com for the South 
95 days to mature; 74 days to roasting ears. Earliest yellow hybrid. Tests indicate it is 
the heaviest yielding corn for the Alleghany Plateau in West Virginia and Western Penn¬ 
sylvania, New York and New England. Medium long ears; 16 straight rows of thick, sound 
grain. Ears placed low on a leafy, stocky stalk 8 feet tall, that will stand up all winter in 
spite of storms. Extremely deep roots and drought-resistant. It yielded 116.6 bushels per 
acre in one test, compared to 75.7 bushels for Clarage. A 40-acre field we were growing for 
seed averaged 120 bushels per acre. 
CERTIFIED YELLOW CORN BELT HYBRID CORNS 
Grown under rigid supervision and certified by the Ohio Crop Improvement Associa¬ 
tion. Selected by U. S. and State Experiment Stations after many years testing as the 
highest yielding Certified Corn Belt Hybrids for the territory recommended below. 
IOWA 939 —105 days. Wide adaptation across northern half of corn belt. Outyielded all 
certified hybrids two years in West Virginia, averaging 25.5% increased yield over the 
best local variety at three experiment stations—125 bushels per acre in one test. High¬ 
est yield at State College, Pa., outyielding College White Cap 22% for two years. Very 
leafy stocky stalk; ears placed low and held up all winter. 
IT. S. 44 —Matures in 113 days. Developed at U. S. Arlington, Va. 
Experiment Station. Includes Lancaster Surecrop inbred with 
same maturity and wide adaptation, including Northern Ken¬ 
tucky and lower altitudes in West Virginia. Highest yield of 
grain or silage at all five Southern Ohio Experiment Stations, 
yielding 108 bushels per acre at Montgomery. Only 2% lodged 
stalks in College Park, Md., test; local varieties lodged 12%. 
Strongest stalk in Lancaster, Pa., test, only 2% lodging to 22% 
to 35% for local varieties. Long, solid ear. 
OHIO D-31 — 113 days. Involves Lancaster Surecrop with same 
maturity and wide adaptation from the Ohio River as far north 
as Columbus. Ohio, and altitudes under 2,000 feet in West Vir¬ 
ginia. It yielded 131 bushels per acre in Taylor, W. Va., and 119 
bushels in Lakin, W. Va.. tests. It made remarkably high yields 
at Falmouth, Ky. Beautiful show type ears, 11 inches long; 16 
rows of deep grain; medium dent; medium tall stalk. Recom¬ 
mended for silage in Central Ohio. 
IT. S. 52 (Ohio C-72) —110 days. Adapted to southern Pennsylvania 
through southern half of corn helt. Storm-resistant; only 2% 
lodged stalks in College Park, Md., test, yielding 14 to 33% more 
than local varieties which lodged about 12%. Yielded 123.4 
bushels per acre, highest in Lakin, W. Va., test. 
INDIANA 614- —110 days. Adapted to southern half corn belt, me¬ 
dium altitudes in West Virginia. Silage in Central Ohio. 
IDDINOIS 172 — 108 days. Adapted to central corn belt. Western 
Maryland, Pennsylvania. Highest yielding certified hybrid two 
years in southern West Virginia tests under 1,000 feet, yielding 
109.2 bushels per acre in one test. Highest yield at two central 
Ohio experiment stations. Long ears; strong stalks and deep 
roots. 
N. Y. 29-3 — 95 days. Early; outyielded all corn belt hybrids two 
years in northern West Virginia tests over 2,000 feet. Popular in 
New York and New England. 
Onr corn experts hand pollinating' Inbred lines of 
Wood’s Hybrid Extra Early Yellow Dent 
