The sample trees ranged in
size from 14 inches to 50 inches diameter at breast height (DBH).
Six of the trees were also bored for age at breast height (4.5 feet
above ground level). Ages ranged from 90 years to 140 years with
an average of 121 years. Growth was gauged by measuring six 5-year
radial growth increments over the past 30 years. Radial growth of
the trees was compared within each tree to determine if a significant
deceleration or acceleration of growth was occurring. Radial growth
was also compared between trees to determine if a discernable difference
was occurring between trees adjacent to trail surfaces and trees
off trails. Particular attention was given to paired sample trees,
or sample trees located close to one another, one tree immediately
adjacent to the trail and the other tree about 30 feet from the
trail.
