Tractor field plowing. Find the center of the field in the front center and back, mark off the center with stakes or sticks if you want to just run them over.Eye up the last stake with the first two just to give yourself a straight line. Line up the tractor on the stakes and plow as straight as you can.ind the center of the field in the front center and back, mark off the center with stakes or sticks if you want to just run them over. Eye up the last stake with the first two just to give yourself a straight line.