Hypertraction

Traction with coefficient of traction >1 achieved by aggressive treads or spikes that dig into the ground. For example, like in LifeTrac v16 (see Tractor Genealogy series, used in the hazelnut planting of 2016. The treads were 2" deep, 1/4" angle, and were very uncomfortable to the operator, such that walking behind the tractor was favored to riding upon it. They would not slip, though - outside of after rain - which is a proof of concept that the machine could be lighter than its traction effort.

There are no known industry standards that match this. This could be because of the discomfort to the operator, which can be addressed with autonomous tractors.