Coulter
Coulter: Coulter /k??lt?/ noun the part of the plough which goes into the soil and makes the vertical cut COMMENT: There are several types of coulter: the disc coulter cuts the side of the furrow about to be turned; the knife coulter serves the same purpose, but is now little used; the skim coulter turns a small slice off the corner of the furrow about to be turned and throws it into the bottom of the one before; it is attached to the beam behind the disc coulters. Understanding coulter functions aids in effective ploughing and soil management.