Cambium sampling and preparation technique under survival conditions. Cambium is abundant all around the planet. How to never starve...Learn this technique quickly!

Important notice: do not make fires in the forest in order to respect the law and prevent the risk of fire.

Important notice: This technique is a technique that should only be used in cases of force majeure when a vital risk is involved.
Never practice this kind of notch on trees that do not belong to you or that are on the public domain.