If this cannot be avoided special tree wells can be constructed. Tree wells are expensive to build so be sure any wells you build are for a tree you really want to save. Home and garden equipment is little more than a home version of construction equipment. Most people figure the only way to make sure they mow close enough to a tree is to hit it with the lawnmower. To eliminate this temptation, remove the grass or apply a woodchip mulch around the tree.
Weed whips can be devastating to young trees.
The whip can cut right through thin bark and girdle the tree. Use clippers around young trees. Use guideposts to mark boundaries for snowplows. This will keep them off the shr ubs and trees. Some trees are extremely susceptible to deicing salts.