>> “”One time” seed for most crops has been used since at least the 1950’s, more than 60 years.” <<
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But that is not “Terminator” seed; that’s just ordinary cross polinated seed that reverts back to one of the parent varieties on the regrowth.
There is nothing wrong with natural cross breeding.
While the 'terminator' seed of the 50s, 60s, and 70s weren't sterile, they might just as well have been, as they were all but useless.
In corn, the parent plant would produce 100 to 175 bushels per acre back then, the offspring maybe 25 bushels. No one even tried, except as a fun little experiment.
Today, that very same field, with modern GM plants, produces 200 to 300 bushels per acre, with seed being the single, key, component in the 100% increase in yields.
If you ever get a chance to ride a corn combine, jump at the chance, as the amount of clean, high quality grain flowing into the grain bin is absolutly astounding. It's nearly a flood. Farmers in the upper midwest have had to switch to grain carts and semitrucks to haul away the crop, as production has doubled in the last 25 years, and the crop comes in at an incredable rate.