furrow - note the etymology from "pig". I had to make a garden out of a field that had been
neglected so long that it was full of trees big enough I could not plow it. But I put in a big pig
pen, and they guickly dug up the roots enough so that my tractor could pull up the stump.
It made me realize what a help to the first settlers in New England to have animals turn up
stones and roots to make land arable.

furrow
n.
5ME forwe < OE furh, akin to Ger furche (OHG furuh) < IE base *perk3, to dig up, furrow > *porkos, L porca, furrow, porcus, pig (lit., digger)6
1 a narrow groove made in the ground by a plow
2 anything resembling this, as a deep, narrow rut made by a wheel, a deep wrinkle on the face, etc.
3 [Obs.] plowed land
vt.
5< the n. 6 to make a furrow or furrows in
vi.
1 to make furrows
2 to become wrinkled

From somewhere I remember a poem about a ship: "....and the furrow followed free...."
Gotta go search for that. Found it. From The Ancient Mariner:

The fair breeze blew, the white foam flew,
The furrow followed free:
We were the first that ever burst
Into that silent sea.