Mechanical weeding, row crops
Removing weeds between and within crop rows without herbicide, at a scale where hand weeding is not viable.
No machines listed against this yet.
The problem is catalogued; the models that address it are added as they are entered, each with the datasheet the specs came from.
Regulation
Demand is frequently driven by herbicide restrictions and residue limits rather than labour cost alone. Check national and EU rules for the specific active ingredients being replaced, and whether any subsidy scheme applies.