Patent ID: 8813865

Claim:
A method of tilling soil, comprising the steps of: moving a tillage unit so as to traverse said soil, said tillage unit including a coulter blade having a pair of opposed side faces, with the coulter blade penetrating the soil as the coulter unit traverses the soil; limiting the depth of the coulter blade in the soil during said soil traversal by shifting a pair of loops respectively located astride and proximal to a corresponding coulter side face, each of said loops presenting an upper run and a lower run, said shifting step including the step of causing said lower runs to engage the upper surface of the soil, said loops supported by a carriage assembly having, for each loop, spaced apart fore and aft lower loop supports, said lower runs of said loops being generally flat and extending between corresponding fore and aft lower loop supports; and maintaining said lower loop runs in substantial contact with said soil surface as the coulter unit traverses the soil.