'Fields' in the Bible

Ye mountains of Gilboa, let there be no dew, no rain upon you, nor fields of heave-offerings! For there the shield of the mighty was vilely cast away, The shield of Saul, as not anointed with oil.

And Urijah said to David, The ark, and Israel, and Judah abide in booths; and my lord Joab, and the servants of my lord, are encamped in the open fields: shall I then go into my house, to eat and to drink, and to lie with my wife? As thou livest, and as thy soul liveth, I will not do this thing.