Trees in the Big Tree Registry of the Minnesota Department of Natural Resources are measured by circumference (in inches), height and crown spread. Below are the DNR's guidelines for measurement.

Find a tall stick. That and one good eye are all the tools you’ll need. With the stick in hand, walk exactly 11 paces from the base of the tree and mark the spot by driving the stick into the ground.

Scientists have created the first global map of forest height using satellite data. The map will improve estimates of how much carbon is stored in Earth’s trees and how much carbon dioxide they absorb ...

Some people swear that their live tree grows taller and wider on the way from the tree farm to home, said Nancy Kothera, co-owner of Rhodes Sisters Tree Farm in Huntsburg. Kothera thinks it's more ...