Estimating tree bole and log weights from green densities measured with the Bergstrom Xylodensimeter.

Dale R. Waddell; Michael B. Lambert; W.Y. Pong

doi:10.2737/PNW-RP-322

Treesearch

Estimating tree bole and log weights from green densities measured with the Bergstrom Xylodensimeter.

Informally Refereed

Authors:

Dale R. Waddell, Michael B. Lambert, W.Y. Pong

Year:

1984

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-322

Source:

Res. Pap. PNW-RP-322. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p

Download (PDF 1.69 MB)

Download (PDF 1.69 MB): https://research.fs.usda.gov/download/treesearch/25227.pdf

Abstract

The performance of the Bergstrom xylodensimeter, designed to measure the green density of wood, was investigated and compared with a technique that derived green densities from wood disk samples. In addition, log and bole weights of old-growth Douglas-fir and western hemlock were calculated by various formulas and compared with lifted weights measured with a load cell attached to a front-end loader. The Bergstrom xylodensimeter accurately measured green wood density and is useful for estimating log weights.

Keywords

log measurements, boles, wood density, cubic volume measure, measuring equipment, old-growth stands

Citation

Waddell, Dale R.; Lambert, Michael B.; Pong, W.Y. 1984. Estimating tree bole and log weights from green densities measured with the Bergstrom Xylodensimeter. Res. Pap. PNW-RP-322. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p