I heard a talk about preventing injury to trees. Drought, soil compaction, erosion and soil movement are more often of a problem to trees than are insects and diseases. Let me share a few tree tips. The most important part of a tree is underground, the roots. Protecting them is vital to good tree health.
Roots extend at least twice as far out from the tree as the limbs.
Never let vehicles drive near trees. It compacts the soil, killing roots and hurting the tree. Soil compaction does not go away. Tests show it is still there 40 years later. There is also very little you can do to break up the soil once it is compacted since, we do not like to till under trees.