'Harvest' in the Bible

So Naomi returned, and Ruth the Moabitess, her daughter-in-law, with her, who returned out of the country of Moab: and they came to Bethlehem in the beginning of barley harvest.

And Ruth the Moabitess said, Yea, he said unto me, Thou shalt keep fast by my young men, until they have ended all my harvest.

So she kept fast by the maidens of Boaz, to glean unto the end of barley harvest and of wheat harvest; and she dwelt with her mother-in-law.