Trays with plants are often buffered from the operation area to the shipping area with roller tracks where they place the tray onto carts. The problem with these roller tracks, is that they works by gravity. Most trays are also seriously affected by the size/weight of a plant and the amount of water in the pot. This ensures that if the trays with a high speed to halfway down not always remain standing. For these problems Crea-Tech developed the powered roller conveyor. The conventional roller conveyor by means or a special a belt driven. Making a stationary tray getting just that push, to make the tray moving again.