Reclamation - restoring disturbed lands

The way I assume it works is that the humans walk a trail or in a particular direction and the dogs run out from that trail several hundred metres to the left and right, massively increasing the coverage area.

This breed of doggo is highly intelligent and highly trainable. I don't know to what extent these ones have been trained but Border Collies can be trained to operate with remarkable precision, basically like they're remote controlled. Look up any sheep dog trial videos for good examples of the intelligence and precision they are capable of working at. They can both follow complex commands and problem-solve on the fly and even be taught to avoid flagged zones that you could mark as you go, which might be areas with delicate new growth or sections that have been covered already.