Which was in a place covered at the top, but open elsewhere, whither Ruth might easily come. And this work of winnowing corn was usually begun or ended with a feast, as may be gathered both from Ruth 3:7, and from other instances, wherein they used to do so upon like occasions; and this work was to begin this evening, and, as some think, was done only in the evenings, when the heat grew less, and the wind began to blow. See Genesis 3:8.
Related Commentaries of Ruth 3:2
Ruth 3:2
2 And now is not Boaz of our kindred, with whose maidens thou wast? Behold, he winnoweth barley to night in the threshingfloor.