Asked July 08, 2016, 8:08 PM EDT
Lincoln County Oregon
For the first question, it looks like a nutritional deficiency. The first website article attached is about nutritional deficiencies, particularly nitrogen, magnesium and manganese.
For your question about root pruning and repotting, the second web article will apply. You repot if you want the tree to grow larger, and you prune the roots by no more than 25% if you want to keep the tree the same size.