In case you’ve never seen up close what Mexican workers do on U.S. farms (it was new to me), please take a few minutes to see this video. The narration is in Spanish, but I’ll explain it below.
The task involves three people. The first worker cuts the lettuce. The second worker trims the lettuce head so it will fit properly in the box. The third worker cleans off the cut end of the lettuce head, which has accumulated some white sap after cutting. Then the fourth worker assembles boxes, packs each box with a fixed quantity of lettuce heads and then seals the box.
I was most impressed by how fast these guys work. It has to be a really back-breaking task! Can you imagine doing this kind of labor for two to three months at a stretch?