KEYSTONE HYBRID 
SEED CORN 
"CERTIFIED FOR OKLAHOMA" 
ATTENTION, CORN FARMERS 
Follow these 3 practices to raise more 
corn per acre: 
e Plant Keystone Hybrids—both early 
and full season varieties. 
e Have soil tested and give it a full 
treatment of fertilizer. 
e Plant corn thicker. Check with your 
county agent on higher plant popu- 
lation for higher yields. 
Be sure to get the varieties you want. 
Place your order now! 
CHECK THE CHART BELOW 
THERE'S A KEYSTONE HYBRID TO FIT 
EVERY NEED! 
WRITE FOR PRICES 
VARIETY Maturity | Far Following 
KEYSTONE 38 Fer | est Seton, 
KEYSTONE 39 of) 
KEYSTONE 40 owt |. 
KEYSTONE 42 rae 
KEYSTONE 45 SHE) ts 
KEYSTONE 222 = ss.) Sean 
KEYSTONE 106W 1 | vis 
KEYSTONE 111Wo- “sz 
U.S. 13 “Certiries | | Sees 
18 
The above picture is typical of the TWO BIG ears that are found on most 
every stalk of this fine hybrid. 
you try Keystone 222. You will be more than pleased with results. 
Many stalks make THREE EARS. We suggest 
GENERAL DESCRIPTION AND RECOMMENDATION FOR USE OF EACH 
KEYSTONE HYBRID 
Keystone 38 has held the top-position for several years as the most populai 
high-yielding yellow hybrid being planted in Oklahoma. It gained its reputa 
tion by reason of its outstanding performance in test plots and on thousand: 
of farms. Plant at least half the crop with Keystone 38. ‘ 
One year, Keystone 39 was the highest-yielding yellow hybrid in Oklahomé 
Official yield trials. That was a dry year and its extreme earliness really paic 
off. For this reason, many farmers are still planting Keystone 39! 
eee FO weirin’ sone sH¥ Ss Ses See ee ee 
Keystone 40 was bred especially for thin and sandy soils. A few days late! 
in maturity than Keystone 38. A good ensilage corn and a good hybrid t 
plant with Keystone 38 and 42 on thin and sandy soils. 
ee ee er a eee | 
Keystone 42 has been a record breaker in official Oklahoma yield trials for fh 
last three years. Closely related to Keystone 39, it might be called an i 
proved Keystone 39. Its best records have been made in eastern and norther( 
yield trials in Oklahoma. Try 42! | 
Keystone 45 is a comparatively new hybrid in Oklahoma but yield trial result: 
indicate that this big-eared hybrid may be especially well adapted to Okla 
homa. We suggest that you try it this year! | 
Keystone 222 has proven itself! If you want a full-season hybrid, you simpl 
cannot buy a better hybrid than Keystone 222! Yields of 150 to 200 bushel 
per acre have been reported in several areas in Oklahoma. Be sure to plan 
Keystone 222 along with one or two of the early Keystone hybrids! 
An outstanding white hybrid for both yield and quality of grain. Has ver 
good record in yield trials. Strong stalks, deep roots and quality of grain 
plus high yields, make it a better hybrid than most white hybrids on th¢ 
market. Closely related to Keystone 111W. 
Keystone 111W is an improved Keystone 106W. Slightly higher yielding anc 
slightly larger grains. 
millers favor Keystone 111W. 
U. S. 13 has made good yields in official trials. 
to produce Oklahoma Certified U. S. 13 for those farmers who are still plant 
ing this old timer. You will like that Keystone Quality! 
PERFECTION BRAND SEEDS—Since 1906 
For hominy and other related products, the white cori 
Therefore, we are continuing 
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