There are various ways to measure plant health, and we’ve seen many projects creating open-source solutions. One we haven’t seen is a dendrometer, which involves measuring various physical dimensions ...

Instructions for making and using a tree measuring stick are available from publication FNR-4: How to Make and Use the Tree Measuring Stick. Those instructions call for blueprint paper, which can be ...

We've all heard about counting the rings inside a tree trunk to discover its age. But there are other ways to determine a tree's age without chopping it down.

image: Tomogram showing areas of wood decay in a tree with an irregularly shaped trunk, based on sonic tomography with the PiCUS 3 Sonic Tomograph. view more Living trees can rot from the inside out, ...