It should be noted that the drawing Figure 4 represents an ideal situation! While ideal situations are nice in
theory, they rarely occur in actual practice. Usually the stratification area will not be clearly defined and must
be assumed to occupy an area from 5 to 15 square feet around the feeder. The separation process begins
immediately after the material becomes even partially stratified. Therefore, it is important to stratify the material
as quickly as possible; or light material may be carried to the high side of the deck before the stratification
process occurs. The best way to accomplish this is to use more air at the feed end than at the discharge end.