Hi everyone I don’t have a good record of caring for plants but I’m desperately trying to maintain our yard. Can anyone help me figure out what’s happening to my shunmard oak tree? The bark on the trunk is cracked and lifting. We’re in Arizona so it does get hot in the summer, easily triple digits most days. And the plant is in full sun. We have an automatic drip system to the tree, and add fertilizer and mulch every 6months. I don’t see any signs of larvae or bugs. The side of the trunk that is splitting/lifting is sun facing, the back side of the tree never gets direct sunlight isn’t splitting at all. Is this sun-scald? How do I help the tree?