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  1. Air pollutants affect the relative growth rate of hardwood seedlings

    One-year-old seedlings of yellow-poplar (Liriodendron tulipifera L.), eastern cottonwood (Populus deltoides Bartr.), and white ash (Fraxinus americana L.) were divided into four groups. One group served as the control, and the other groups were fumigated for 12 hours per day with either 0.1 ppm O3

    Author(s):
    Keith F. Jensen
    Year:
    1981
    Keywords:
    Source:
    Res. Pap. NE-470. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 5p.

  2. Effect of acid mist and air pollutants on yellow-poplar seedling height and leaf growth

    One-year-old yellow-poplar seedlings were treated with acid mist at pH 2.5, 3.5, 4.5, and 5.5 either alone or in combination with 0.1 ppm 03, S02, and NO2 or NO2 plus S02. After 4 and 8 weeks of treatment, height, leaf area, and leaf and new shoot weight were determined and growth analysis variables calculated. Height, leaf area, and dry weight decreased with...

    Author(s):
    Leon S. Dochinger; Keith F. Jensen; Keith F. Jensen
    Year:
    1985
    Keywords:
    acid deposition, yellow-poplar seedlings
    Source:
    Res. Pap. NE-572. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station; 1985. 4 p.

  3. Low-Cost Opportunity for Small-Scale Manufacture of Hardwood Blanks

    We analyzed the manufacture of standard-size hardwood blanks from lumber on a relatively small scale by conventional processing. Requiring an investment of just over $200,000, the conventional mill can process 500 M bf (thousand board feet) of kiln-dried lumber annually. The study focused on the economics associated with manufacture of blanks from four species -...

    Author(s):
    Bruce G. Hansen; Philip A. Araman
    Year:
    1985
    Keywords:
    Source:
    FS Research Paper NE-559. 6 pp.

  4. Butt log quality of trees in Pennsylvania oak stands

    Describes the distribution of sawtimber trees by diameter at breast height (d.b.h.) and grade for eight hardwood species in upland oak stands of Pennsylvania. The proportion of trees by d.b.h. and grade revealed differences between species. The quality of northern red oak, white oak, and yellow-poplar appeared inherently better than that of red maple, chestnut oak, and...

    Author(s):
    Martin E. Dale; Robert L. Brisbin; Robert L. Brisbin
    Year:
    1985
    Keywords:
    grading, quality, value
    Source:
    Res. Pap. NE-568. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 8 p.
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