i'm sure i'm oversimplifying but if you can reliably identify your crop then everything else is a weed. Maybe put some kind of GMO marker that makes what you want to keep stick out like a sore thumb then you just nuke everything else.
This is the traditional approach and it really blows my mind that so many hammer-syndrome AI/ML/flavor-of-the-month VC spenders haven't simply gone to see for themselves what works on farms. It probably doesn't even register to the casual observer, but planting a careful row of tomatoes with the root ball in a particular direction is a fit for the cultivator tool to come by and turn the soil up on the stem of the young, but now established plant.
That's actually the "weed control at scale" developed in conjunction with the tractor.
I'm not a fan of modern conventional agriculture. The abuse done to topsoil is terrible, and we need better systems. But new systems need to keep their eye on the ball and the ball is a John Deere pulling a 40-foot cultivator across a field while the "operator" reads twitter ( or <verb>s Clubhouse ) only looking up to mind the turns.
Everything starts somewhere, but just because your tech has ML and Laserbeams doesn't mean it passes the tool/toy test.
