plow on

:  an implement used to cut, lift, and turn over soil especially in preparing a seedbed

:  any of various devices (such as a snowplow) operating like a plow

:  to turn, break up, or work with a plow

:  to make (something, such as a furrow) with a plow

:  to cut into, open, or make furrows or ridges in with or as if with a plow