A soil sampler liner with areas of reduced wall thickness is defined by a
continuous wall that has a reduced area extending along at least a portion
of the length of the liner. The liner is inserted into the inner bore of a
sampler probe, and a soil sample is taken by vertically inserting the
probe and liner into the ground. The wall of the liner has at least two
distinct areas of varying thickness; a reduced wall area and wall areas
adjacent to the reduced wall area. The walls are sufficiently strong to
withstand the forces applied to the liner when taking relatively
large-diameter soil samples. The thickness of the wall at the reduced wall
area is less than the thickness of the wall at the adjacent areas to
permit a user to easily and safely cut through the wall at the reduced
wall area and remove a large-diameter soil sample from the liner. The
liner is also radially compressible into a flattened shape for compact and
economical packaging and shipment of liners in relatively large
quantities.