One day before screening soil, place samples out to dry on drying racks, with one-quarter sheet of unused newspaper between the tray and sample. Sample bag and tag should be clipped to the tray used.
Before beginning, check that the collection tray and rollers of the soil crusher are clean. Turn the machine on using the side-mounted switch. Slowly pour a sample into the feed-chute.
Clean the rollers using the wire brush. It is important to do this before collecting the sample to avoid possible contamination of subsequent samples. Collect the sample from the tray and return to the sample bag. Used newspaper should be discarded and the collection tray should be cleaned before returning it to the machine. When complete, all samples should be returned to the cold room for storage.