When it's time to cut, it's time to cut.
When it's too wet the combines can't go out into the fields, when the winds come the corn is blown onto the ground and can't be picked up. There's hail and frost too. So when it's time, dry and calm, everything needs to happen at once. and quickly. Early mornings and into the night. Like a tightly choreographed military maneuver of harvester and hopper and the big rigs to haul everything off to the silos.