For example, with iceberg lettuce, the head is cut by hand and trimmed, then laid on a table that conveys it to the center where workers on the wagon field wrap it in plastic and place 32-heads per box, which are then stacked on the wagon. This process has significantly reduced the cost of harvesting and packing iceberg lettuce. A similar process is applied to melons and cantaloupe, except they are packed directly into boxes without plastic wrap.