I planted a Burr Oak last year and this year the leaves all over the tree are tightly bunched and curled, a little yellow around the outside fringes.  Some of the branches are growing in a distorted, curled manner.  When I planted, I amended the soil with Back to Earth organic compost, but the native soil is a sandy clay loam residuum.  I don't know the pH of the soil.  The tree is about 10 ft. tall, but quite skinny (it had been in a pretty small pot at the nursery when I bought it).  I water it 10-20 gallons 2 times/week unless it has been raining frequently, then I water if the soil is dry. It is lightly mulched with wood chips (about 1" deep) We are located about 20 miles south of Durango on the edge of a canyon east of the Animas River valley.