rowen
A second crop of hay (within a growing season).
archaic
A stubble field left unploughed until late in the autumn, so that it can be cropped by cattle.
For the wintering of cattle, about September you must turn them out that you design to keep up for a winter or a spring market, and your cows, that give milk into your rowens, till snow or a hard frost comes, and they will need no fodder.
Where it comes from
From Middle English rewayn, from Anglo-Norman rewain, from an Old Northern French variant of Old French regain (“an increase”), from re- + gaigner (“to till, win”). The alternative forms represent replacement of unanalysable final /ən/ with the more tractable suffixes -et, -ing; roughing presumably relies on a lost pronunciation of rough as /ˈɹaʊ/.
Adapted from the Wiktionary entry rowen (CC BY-SA 4.0).