It started yellowing last year after transplantation. Perhaps it was to old to be moved (transplantation stress)? Fungal disease? I'm afraid it will eventually loose all of its needles. I gave it liquid fertilizer several times throughout the previous year. Recently I added some organic fert.(manure). Not sure about the exact soil pH, but it was not acidic at the time. Btw, I threw some gypsum powder around the pine 6months ago, soil was somewhat hard.
Maybe give it another year or two to settle in to see if it recovers. From the very short, dense-foliaged shoots at the top, it looks as though it suffered very severe root damage when it was dug and moved. Don't add fertiliser, it won't help at all, and can hinder water uptake, which is the most important thing for a tree with a minimal root system.
