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The proof of seed is in the crops they produce. Between good seed and ordinary sced there is 
the difference between fine crops and poor crops—in both yield and quality. That is why it 
pays to plant your fields with McMahon’s Registered Brands Seeds—seeds that have been tried 
and selected for performance, that will satisfy the most discriminating grower. Don’t gamble 
with seed of unknown origin when the whole crop is at stake. Registered Brands Seeds are 
sure seeds in two important ways: 
1. Our experience assures you the correct variety for this area. For more than half a century 
we have been selling field seeds to the farmers of this region. We know from our long and 
close association with the farmers just what strains and varieties do best in this area. We know 
what to suggest for every type of soil, and our experience is always available to our customers. 
2. Our cleaning plant assures you only clean seeds. By use of the latest seed cleaning equipment, 
we remove chaff, broken seed, dirt, and weed seeds that may be present. We use every device 
available to see that you get all seed when you buy Registered Brands Seeds. 
OUR SEED CLEANING SERVICE is also available to our customers who want to sell clean 
seeds from their own fields. You’ll be surprised at the small cost for which you can improve 
the grade of your seed by having our cleaning plant remove inert material and weed seeds. 
McMAHON COMPANY, Ine. 
Two Fine Stores to Serve You 
Rapid City. South Dakota Sturgis. South Dakota 

