The steam-flaked corn held in the left hand weighs 30 pounds per bushel, which means that the grain processor did a good job. The steam-flaked corn on the right, weighing 39 pounds per bushel, is not as good. Other than the visual clue that the one on the left is flatter, without using a weight-per-bushel tester shown (inset), it's difficult to tell the difference in feed quality.