[TeMPOraL]

I recall when HN was discussing dropping seeds from an AC-130 few years ago, someone pointed out that it would be much more cost-effective to just hire locals to do it by hand. The same will probably apply to drone-planters.

[toyg]

Not even "locals" - depending on location, you could bus in (or even fly in) masses of low-paid low-skill workers from somewhere else, like it happens for other agri tasks.