Abstract
Abstract The effects of nitrogen fertilization on the relative wood density and growth of yellow-poplar (Liriodendron tulipifera L.) were studied over two growth periods. Transmitted gamma rays were used to measure relative wood density. A small but significant decrease in relative wood density was accompanied by diameter, height, basal area, and cubic volume increases of much greater magnitude. These results suggest a small wood quality loss relative to the volume gain from nitrogen fertilization of yellow-poplar on deficient sites.
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