Prof Mark Weislogel from Portland State University joins Emma the Space Gardener to explore engineering solutions to the challenge of watering plants in space.
11.08.2023 - 00:09 / gardeningknowhow.com
Paint marks on trees are a form of communication used by landowners to designate instructions to loggers or the public, for example. It is more permanent than printed signs and can prevent timber theft. Learn more about this unusual system.
You may get an eerie feeling when walking through a forest when you see strange paint markings on trees. Never fear, it’s not evidence of outer space invasion but tree-marking symbols. They can indicate property lines, timber harvesting boundaries, which trees to cut, and even “no trespassing.” Trees marked with paint are a form of communication used by landowners, loggers, foresters, and the U.S. Forest Service.
The Forest Service developed the system as a way to account for and value forest trees before they are removed from national forest lands. It is a good way to quickly identify which trees are to be cut or stay for a sales contract, and marking trees also helps to prevent timber theft.
Tree painters use special marking paint that contains registered tracers when they mark trees slated for sale. Paint can be aerosol cans, oil-based, or latex. The oil based paints last about five years but some authorities say it can penetrate wood and damage the tree. Latex paint lasts about three years. Many paint the mark about eye level on the tree. If desired, the bark can be scraped off to create a smooth painting surface, about 4 inches (10 cm) wide and 6 inches (15 cm) long. The marks need to be checked every two to three years and repainted every five years.
The painted color codes can vary by the region, the forest service, or the timber contracting office, but here are some general guidelines.
The next time you’re walking in the woods and someone asks, “What does purple paint on trees
Prof Mark Weislogel from Portland State University joins Emma the Space Gardener to explore engineering solutions to the challenge of watering plants in space.
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New Trees: Recent Introductions to Cultivation by John Grimshaw, Ross Bayton and illustrated by Hazel Wilks. Amazon
An unusual tree with even more unusual fruit.
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Credits Quiver Tree by hibbijibbies CC BY-ND 2.0 “Midas tree by Paul WatsonCC BY-NC-SA 2.0
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