Den Blick in den Boden erweitern.

The article focuses on root space and its importance for tree health will not be sufficient and tree working group in the ground have the knowledge about the root space. It mentions tree physiological point of view, disturbances such as compaction, sealing, water and nutrient deficiency or entry viewed from pollutants. It also mentions earthworms and mycorrhiza or to the right-basic principles of soil.