NORTHRUP, KING & CO'S DEPENDABLE STERLING SEED CORN 
Production of Sterling Seed Corn 
(Open Pollinated) 
If you buy a variety of Sterling seed corn one year and find it has the 
proper earliness and shows a good yield, you want to be sure you will get 
the same strain of corn the next year you buy the same variety of Sterling- 
seed corn. 
The only way we can assure you of this is to grow all our seed corn 
especially for seed from our own foundation stocks and under our own 
supervision. This is obvious. Yet Northrup, King & Co. is one of a very 
few seedsmen who do this. 
Strains of the varieties we are now growing are those which have - 
been selected after years of superior performance in our trial grounds 
and on customers’ farms. Between 1920 and 1925, we investigated the 
possibility of growing seed of the native North Dakota strains in central 
Minnesota in such a manner as to maintain the earliness of the original 
seed. 
Both the North Dakota and Crookston Experiment Stations co¬ 
operated with us in comparing seed of their own strain grown in Wright 
County by us for one or two years with that grown continually in their 
section. They found with our careful production methods we were able 
to maintain the original earliness and our seed produced a little higher 
yield. In order to guard against mixtures with later maturing central 
Minnesota strains, we secure new seed, from North Dakota and Northwest 
Minnesota, of these extra early strains every few years. 
The same principles are followed with production of Wisconsin varie¬ 
ties for seed in Minnesota. We have selected foundation strains which are 
maintained in Wisconsin. We secure new seed from these sources from 
which to grow our seed crops of these varieties in Minnesota. 
By so doing, we have been able to maintain in our stocks the factors 
of acclimatization to Wisconsin conditions while producing seed in the 
more favorable seed producing area of eastern Minnesota. 
Extra Early Northwestern Dent, Crookston Strain, growing at the Crookston 
Experiment Station. 
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