Read again, he’s a soil scientist and professor at OSU that made his lecture available for free on YouTube.
You didn’t say “less kids,” you said smaller population.
And I can see how much of an appetite you have for learning things that aren’t “kill kill death death,” so yeah. Won’t waste more of my time explaining. You can’t even be bothered to understand that professors can post lectures online.
The entire point is to not plow ever. It’s bad to penetrate the soil.
We have drones that can farm. I’m not going to list them all because it’s clear you lack any foundational knowledge and just need a summary, so here: https://en.m.wikipedia.org/wiki/Agricultural_drone
My own family uses drones in farming here in the US. Not for everything, yet, but gee, if our government would fund it, it would happen immediately. Idk how this is surprising.