The little heaters
That come in the corn bags from the store are perhaps more technology.
I think they have been developed to prevent early frost on the corn.
If they heat to high the corn might even pop in the field.
The afore Tech is perhaps why USDA knows there's another big crop now.
Re: The little heaters
A lot of milk stage corn out there in the little tour I did yesterday.
Let's say 35 days to black layer, let's make it 45 given what looks like it will be slow GDD accumulation.
Odds say it gets close.