One factor to consider is how hot it got for these seeds while in that planter. Corn seed is tough, but has it"s limits. Heat kills seed viability.
Second factor is you are dealing with 40 yr old seed technology...likely not nearly as good performance as new seed.
Third factor is you may/will not save any money planting seed that old as the yield, if any, will be much less than new seed. Simple equation: For good yields you need good seed.
But, if you want to play around with it, lay out 3-4 paper towels on top of each other to make a soft "nest". Lay this on work bench or similar level surface. Count out 100 kernels and lay them on the towels...space them out. Cover this with 3-4 more paper towels. Wet the towels thoroughly. Keep them moist (not soaked) for about 1 week.
After 1 week open the towels and count how many have germinated. That will give you the percentage of seeds germinating under warm conditions.
Most seed companies do a "cold germ test", at about 50 degrees, during the early winter months in labs. Some seeds that germinate well when warm often fail under cold test and can be a problem getting them to grow in fields in spring.
I am betting some of those kernels will germinate but that factor proves little in future performance. LA in WI
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