The tree scale stick used to measure the tree's diameter and its height needs to be calibrated for the length of your reach.
(The tree scale stick; to measure; the tree's diameter) (its height; needs; to be calibrated for the length of your reach) (its height; to be calibrated; for the length of your reach)
The tree scale stick its height its height
to measure needs to be calibrated
the tree's diameter
to be calibrated for the length of your reach
for the length of your reach