Bible Verses About Ploughing: Followed by harrowing and sowing

Doth he that ploweth to sow plow continually? doth he continually open and harrow his ground?

When he hath levelled the face thereof, doth he not cast abroad the fitches, and scatter the cummin, and put in the wheat in rows, and the barley in the appointed place, and the spelt in the border thereof?