Answer: Pines normally drop some of their needles every year, so if you are seeing browning or yellowing of only older needles at the center and/or lower part of the plant then it is probably the normal seasonal change. If the discoloration is toward the ends of the branches, however, it could be a pest or disease problem or possibly a cultural problem (eg planted too deeply, soil not well drained enough, not in full sun, etc.) If you think it is abnormal, I would suggest you consult with your local county extension and/or professionally trained nurseryman to obtain a more specific identification of the problem. Based on knowing that, they can help you determine how to proceed.
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