'Fields' in the Bible

O mountains of Gilboa, let there be no dew or rain on you, you fields of death: for there the arms of the strong have been shamed, the arms of Saul, as if he had not been marked with the holy oil.

There were three sons of Zeruiah there, Joab and Abishai and Asahel: and Asahel was as quick-footed as a roe of the fields.

Then say these words to my servant David, The Lord of armies says, I took you from the fields, from keeping the sheep, so that you might be a ruler over my people, over my people Israel: