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Soil Surface Condition Following Tractor and High-Lead Logging in the Oregon Cascades

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Abstract:

Soil surface condition and bulk density were investigated after tractor and high-lead logging. Surface area of four clearcut units was classified into four disturbance classes. High-lead and tractor areas had about the same proportion of the slightly disturbed and deeply disturbed classes (approximately 23 percent and 9 percent, respectively). The tractor-logged area had about three times more area within the compacted class than did the high-lead (27 vs. 9 percent) and a corresponding decrease in the amount in the undisturbed class (36 percent of tile tractor area vs. 57 percent after high-lead logging). Surface soil bulk densities of samples from undisturbed and slightly disturbed areas were the same as prelogging values. Values for both the deeply disturbed and compacted classes were significantly higher, indicating a decrease in soil porosity. Compaction caused by tractor logging undoubtedly results in some increase in runoff and erosion. However, these undesirable effects are minimized if slopes do not exceed 20 to 30 percent and skidroads are located on the contour.

Document Type: Journal Article

Affiliations: Soil Scientist, Pacific Northwest Forest and Range Expt. Sta., Forest Service, U.S. Dept. Agric., Portland, Ore.

Publication date: April 1, 1965

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.
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