Isn't that more mechanization, not less? Aside from the no-till/permaculture stuff (which has been around for decades now, and has never seemed to take off), w

Isn't that more mechanization, not less? Aside from the no-till/permaculture stuff (which has been around for decades now, and has never seemed to take off), what you are talking about is ultra-automated, extremely centralized farming - and in general, I kinda agree that it's a part of the future. One issue is just that if you're trying to convert solar energy into calories, you naturally want to spread out over a large area (a field) then use an efficient process to do this (photosynthesis). You then want to make these calories easy to process with machines (monoculture), and to defend them against pests (sprayers), etc. So there are advantages for traditional farming that are rooted in simple physics and economics, and a lot of that won't go away. I do think the use of robots to apply pesticides in a more targeted manner is probably something we'll see more and more of, but I think for most crops, building a super-controlled green house is probably never going to be economical.