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| Amen Corner | | A corner of the logging camp bunk house where the ... |
| Anchor cable | | Line used to tie down a yarder to prevent tipping ... |
| Anchor log | | Wooden, concrete, or metal bar buried in the earth to ... |
| Angledozer | | Heavy steel blade mounted across the front of a crawler ... |
| Anisotropic | | Exhibiting different properties when measured along different axes. In ... |
| Annual allowable harvest | | Quantity of timber scheduled to be removed from a particular ... |
| Annual growth | | Average annual increase in the biomass of growing-stock trees of ... |
| Annual growth rings | | The layer of growth that a tree puts on in ... |
| Anvil | | Fixed steel block that provides support and resistance for the ... |
| Appraised price | | Price of a particular timber sale based on the estimate ... |
| Arbor | | The shaft on which a circular saw blade or chip ... |
| Arch | | Supporting device towed behind or mounted on a skidding vehicle. ... |
| Arching | | Skidding logs or trees using a mounted or trailing arch. ... |
| Area regulation | | Method of controlling the annual or periodic acreage harvested from ... |
| Area salvage | | Timber sales in which the USDA Forest Service sells dead ... |
| Articulated | | With reference to a vehicle, hinged at the center for ... |
| Artificial regeneration | | Renewal of the forest by planting or direct seeding; establishing ... |
| Aspect | | Compass direction to which a slope faces. Also called exposure. ... |
| Average yarding distance | | Total yarding distance for all turns divided by total number ... |
| Ax Man | | a woods worker whose main job was using the double-bitted ... |
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