See abstract by Radke and Berry for more
Drilling holes with a tractor mounted
post-hole auger for installation of casings.
Six-inch PVC casings installed in holes
prior to installation of soil columns.
Installing five-inch soil columns inside
of the outer casings. CRREL frost-depth tube is visible in the center of the
Removing a soil column for sampling.
Removing unfrozen soil in 5-cm layers from
the bottom of a soil column with a special auger.
Frozen top portion of a soil column showing
earthworm burrows and a frozen earthworm prior to sectioning.
Technician Paul Doi with chop saw used to
cut the frozen soil into 5-cm sections.
Five-cm section of frozen soil showing
part of an earthworm burrow.