OCR Text |
Show Hardwoods Improve Pines Quality of lumber In second-growth southern pine stands Is improved by the presence of a substantial mixture of second-growth of hardwoods of the same age, recent United States forest service studies show. The shorter, broad-leaved trees help materially in shading out and causing natural pruning prun-ing of tho lower branches of the lines, promoting earlier formation of clear lumber in the growing pine trunks. Rest results were found where the stand included approximately 20 per cent of well-distributed hardwoods. |