'Fallow' in the Bible

"Ephraim, the well-trained heifer, loves to thresh grain, so I will spare her neck. I will turn Ephraim into a pack animal. Judah will pull the plow, and Jacob will turn up the fallow ground.

Sow to yourselves in righteousness, reap in mercy; break up your fallow ground: for it is time to seek the LORD, till he come and rain righteousness upon you.