Skip to Main Content
Soil compaction after yarding of small-diameter Douglas-fir with a small tractor in southwest Oregon.Author(s): Michael P. Amaranthus; David E. Steinfeld
Source: Res. Pap. PNW-RP-504. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 7 p
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
Download Publication (670 KB)
DescriptionThis study evaluated the effect on soil bulk density of yarding small-diameter Douglas-fir (Pseudosuga menziesii var. glauca (Beissn.) Franco) with a small tractor. Levels of compaction were measured before yarding and after one trip, three trips, and six trips by the tractor. Bulk densities in the surface (10 cm) and subsurface (20 cm) for three trips and six trips were higher than pretreatment (p ≤ 0.10); however, increases in soil bulk density were less than 7 percent and well below standards for detrimental soil compaction used by the USDA Forest Service Pacific Northwest Region. Results from this study support observations made in other compaction studies that much of the increase in bulk density from ground-based yarding operations occurs in the first few trips. Other studies, however, show a much higher increase in bulk density over undisturbed values.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationAmaranthus, Michael P.; Steinfeld, David E. 1997. Soil compaction after yarding of small-diameter Douglas-fir with a small tractor in southwest Oregon. Res. Pap. PNW-RP-504. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 7 p
KeywordsApplegate Adaptive Management Area, Douglas-fir, forest harvest, solid compaction, bulk density, logging systems, tractor-yarding
- Yarding-method and slash-treatment effects on compaction, humus, and variation in plantation soils.
- Ecology and management of the commercially harvested American matsutake.
- Soil compaction and organic matter affect conifer seedling nonmycorrhizal and ectomycorrhizal root tip abundance and diversity.
XML: View XML