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    Author(s): James L. Clayton; Gary Kellogg; Neal Forrester
    Date: 1987
    Source: Res. Note INT-372. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 6 p
    Publication Series: Research Note (RN)
    Station: Intermountain Forest Experiment Station
    PDF: View PDF  (20 MB)

    Description

    Two central Idaho clearcuts regenerated naturally to lodgepole pine (Pinus contorta) and one regenerated with planted ponderosa pine (Pinus ponderosa) were evaluated to see if soil compaction and displacement affected growth as measured by tree height, diameter at breast height, and radial growth increment. Pole-sized trees ranging in age from 15 to 25 years occupy the sites, and soils contain considerable volcanic ash in the surface 30 cm. Significant (90 percent level) declines in one or more growth attributes were associated with increased penetration resistance and lateral soil displacement at all three sites. One site had significant (99 percent level) growth declines associated with increased soil bulk density. Results of these studies suggest that steps to minimize lateral soil displacement and compaction are required to maintain potential productivity levels on these soils.

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    Citation

    Clayton, James L.; Kellogg, Gary; Forrester, Neal. 1987. Soil disturbance-tree growth relations in central Idaho clearcuts. Res. Note INT-372. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station. 6 p

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    Keywords

    soil compaction, growth declines, lodgepole pine, ponderoea pine

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