Use of a bark thickness&#151;tree diameter relationship for estimating past diameters of ponderosa pine trees.

Floyd A. Johnson

Treesearch

Use of a bark thickness—tree diameter relationship for estimating past diameters of ponderosa pine trees.

Informally Refereed

Authors:

Floyd A. Johnson

Year:

1956

Type:

Research Note

Station:

Pacific Northwest Research Station

Source:

PNW Old Series Research Notes No. 126, p. 1-3

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Abstract

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 D_p=D_n - W_g (1.121) Where D_p=past diameter outside bark 4.5 feet above ground D_n=present diameter outside bark 4.5 feet above ground W_g=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 D_p=D_n - W_g (1.245)

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