Webster's Revised Unabridged Dictionary · 1913

Rowen

Rowen , noun

[Compare English rough, Old English row, rowe.]

1.
A stubble field left unplowed till late in the autumn, that it may be cropped by cattle.
Turn your cows, that give milk, into your rowens till snow comes. — Mortimer
2.
The second growth of grass in a season; aftermath. [Provincial English & Local, United States]