A 3-inch cup is affixed inside each compartment. The purpose of this cup is explained in the description of the harvesting process. After you construct the box, carry it to the field to be mapped. Set up the box on a turn row or similar area, near the section of row to be harvested. Bring the plants to the box for mapping.
Collapsible sawhorses work quite well as a portable stand for the table.
Such a setup can be disassembled rapidly for transport to the next sample site. The key in area selection is uniformity and field representation. The site selected must represent the field or treatment to be evaluated. It is generally best to select at least four locations in a field from which samples are taken. You can select more or less areas, depending on the nature and purpose for the collection of your data.