. Economics of thinning stagnated ponderosa pine sapling stands in the pine-grass areas of central Washington. Forest thinning; Ponderosa pine Washington (State) Thinning; Forest management Economic aspects. Figure 7.—A 'Tomahawk" mounted on a D-6 crawler tractor. This attachment weighs approximately 2,700 pounds and is useful for crushing slash and brush. acre; and machine piling and burning, $30 to $60 per acre depending on stand density after thinning. The cost of both methods increases with increasing thinned stand density as more care and time are re- quired to maneuver machines at t
. Economics of thinning stagnated ponderosa pine sapling stands in the pine-grass areas of central Washington. Forest thinning; Ponderosa pine Washington (State) Thinning; Forest management Economic aspects. Figure 7.—A 'Tomahawk" mounted on a D-6 crawler tractor. This attachment weighs approximately 2,700 pounds and is useful for crushing slash and brush. acre; and machine piling and burning, $30 to $60 per acre depending on stand density after thinning. The cost of both methods increases with increasing thinned stand density as more care and time are re- quired to maneuver machines at the heavier stocking levels. Other present rotation costs are: general administration, $2. 30 per acre per year; timber sale administration, $ per thousand board feet (covers that part of the timber sale costs not in- cluded in general administration costs); rodent control, $10 per acre (occurs once during a rotation, usually during the first year of regeneration); and, when appro- priate, grass planting, $ per acre (follows the slash removal operation after the precommercial thinning). Now let's consider future manage- ment regimes. These regimes outline our best expectations of what timber harvest plans, including costs and revenues, will be. With clearcutting regimes, site prepa- ration is the first cost of the rotation. We assumed a conservative $24 per acre for this cost. However, depending on topog- raphy and the volume of slash left on the ground from the previous harvest, it may cost as much as $50 to $60 per acre. Site preparation occurs immediately (year 0) in the first rotation. This is followed by the tree-planting operation ($20 per acre) and the rodent control treatment ($10 per acre) in the first year of the rotation. Two hundred trees are planted with an assumed survival rate of 80 percent. A grass-legume mixture is planted ($7. 50 per acre) in the first year. Two growing seasons pass before grazing is permitted. Each year a general adminis- tration co
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