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    Author(s): Floyd A. Johnson
    Date: 1956
    Source: PNW Old Series Research Notes No. 126, p. 1-3
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (550 KB)

    Description

    Whenever past diameters of ponderosa pine trees are required for growth studies or for other purposes they can be estimated with these formulas:
    (1) trees 10 inches and over in diameter at breast height
    Dp=Dn - Wg
    (1.121) Where Dp=past diameter outside bark 4.5 feet above ground
    Dn=present diameter outside bark 4.5 feet above ground
    Wg=diameter growth in wood for specified number of years as measured on an increment core.
    (2) trees less than 10 inches in diameter at breast height Dp=Dn - Wg
    (1.245)

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Johnson, Floyd A. 1956. Use of a bark thickness—tree diameter relationship for estimating past diameters of ponderosa pine trees. PNW Old Series Research Notes No. 126, p. 1-3

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