The Collaborative International Dictionary of English v.0.48:

Rowen \Row"en\, n. [Cf. E. rough, OE. row, rowe.] [Called also
   rowet, rowett, rowings, roughings.]
   1. A stubble field left unplowed till late in the autumn,
      that it may be cropped by cattle.
      [1913 Webster]

            Turn your cows, that give milk, into your rowens
            till snow comes.                      --Mortimer.
      [1913 Webster]

   2. The second growth of grass in a season; aftermath. [Prov.
      Eng. & Local, U.S.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Rowett \Row"ett\, n.
   See Rowen.
   [1913 Webster]