Having corn fields and woods at our field, 2 additional points I would add. When going down each row, you look up/down before you move and one other thing- that is, do you turn around and look back and all around. Pays off, more than once, I've recovered someone's plane because it gives you a different perspective. Planes always seem to land at strange angles and off course..
3 points give you a good straight line. First thing, eye that spot where it disappears. then take your heel and scuff a spot in front of you. Walking, keeping your eye on that spot, walk a fixed distance and drop say your wallet, go to the last point before corn and say drop your hanky. Now replace items so it can be seen from where you were flying and hope it is a straight line. Now you have your bearing.
Whether you find it that day or look later days, you have your bearing if you mark it somehow. Myself, I always carry 45 ft of aluminum poles( each 5 ft to retrieve tree bound planes) and a compass.