Tree Planting Technique

This is a four year old Fraser Fir transplant in it's new home for the next 10 years or so.  Note the 'belt and suspenders' approach we use when planting--first, we lay down drip tape for irrigation, second, we mulch around the base.  Every tree we plant gets this treatment; anything less is a death sentence when July and August turn hot and dry.  So far, other then test for leaks, we haven't had to do any watering yet this year..