I disagree. The nozzles from a ground rig putting out @ 50+ psi at a mere few inches above the canopy have as much driving force as the mist from any aerial machine when it's in it's forward cruise travel mode. This is especially true with newer PWM spray machinery. Helicopters & drones will flatten the corn when they stop & hover. But, that's not how they cruise. The droplets out of aerial spray booms may be going 150 mph for a second, until their momentum is used up. If they were larger droplets they would retain the 150 for a second longer, but when they're microscopic they lose force.

At 20 gpa & 50 psi I easily see bean plants pushed down by ground rig when the nozzle is 20" or less above the canopy.

My question was, if 2 gpa works so well for aerial, why not ground? If I could drive a Hagie @ 25-30 mph through the crop, it should have the same down force as a drone. If I could drive 100+ mph, it would have the same down force as a plane. I thought about my idea of putting air tubes on the boom to simulate aerial application, but have widened the thought out to putting an airfoil on top of the boom. Something small like some guys had on the nose of their Peterbilts for whatever reason.