NORTHRUP, KING & CO'S KINGSCRQST HYBRID SEED CORN 
Why Plant Hybrid Seed Corn? 
Mainly because of higher yields. In the Iowa corn yield contest where 
a large number of hybrids are compared for yield with the best regular 
varieties average yield of the hybrids over a 10 year period was 10% 
higher than with the regular varieties. The best hybrid for 6 years averaged 
17.3% higher yield than the regular varieties. 
Our own average in comparisons, both on farms and regular yield 
plots is from 7 to 11 bushels per acre higher than the regular varieties. 
It is mainly this difference in yield which caused the demand for hybrids 
to exceed the supply from 1933 to 1936. 
Hybrids possess other advantages almost too numerous to mention. 
An important one is their greater resistance to lodging, which makes 
husking easier and reduces damage from ears getting on the ground. 
Greater resistance to drought from 1931 to 1936 very often resulted 
in hybrids yielding twice as much corn as the regular varieties. 
Some hybrids have considerably higher shelling percentages than 
regular varieties. One report is that a farmer had 108 bushels on ear 
which shelled 115 bushels. 
Good hybrid seed corn usually germinates quicker and stronger than 
regular varieties cured in the same way. This often results in a satisfac¬ 
tory stand of hybrid under unfavorable planting conditions where varie¬ 
ties failed to make a stand. 
In this illustration the hybrids are the dark vigorous rows—the open pollenated variety rows are light 
colored and show a poor stand. This field had very unfavorable growing conditions but Kingscrost 
made a fair crop. 
