luckily these things are getting easier. with spot treatment from drones you can hit areas of crops that are affected by bugs or weeds. blanket chemicals won't be eliminated from soil prep for a long time though.
Yes, the drone approach is very tempting. But I still insist on us removing the need to use of manmade chemicals that don't exist in nature naturally... (That I am aware of...)
For instance, I am all fine and dandy with using lye soap and vinegar to kill weeds. It's not 100% effective, but it's also not going to poison you just because your potatoes happen to be near by. Lye is a tricky example, because it's not exactly always natural, but not exactly always manmade either. You can get naturally occuring sources, etc.
