7. Double Check
It is useful to double check your age determination every now and again. On small trees it is relatively quick and easy to compare the age determined by counting whorls to the age determined by felling or drilling the tree.
In some cases, you may want to take a disk cut from breast height or the increment
core back to the office to count rings under improved light and magnification.
To transport cores, place core in a plastic drinking straw and seal the
ends of the straw.