"Clear-cutting" Practices on National Timberlands: Hearings, Ninety-second Congress, First Session ...U.S. Government Printing Office, 1971 - 1247 lappuses |
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annual basal area cut Bitterroot CALIFORNIA/SANTA CRUZ CLIFF committee Congress construction continuous canopy costs Coweeta Creek CRUZ The University develop Douglas-fir effects Engelmann spruce environment environmental erosion even-aged Federal forest land forest management forestry FRANK CHURCH housing goals improved industry land management large clearcuts lodgepole pine lumber and plywood lumber and wood management practices ment methods multiple use planning National Forest nutrient Oregon percent planting ponderosa pine problems protection public lands recreation reforestation regeneration regrowth removal requirements resource result road roadbuilding sediment seed selection cutting Senator CHURCH Senator METCALF shelterwood Shoshone National Forest silvicultural softwood lumber soil species stands streamflow subalpine fir supply sustained yield Task Force testimony Teton Teton National Forest timber harvest timber management timber production timber sale tion treatment trees U.S. Department U.S. Forest Service UNIVERSITY OF CALIFORNIA/SANTA vegetation water yield watershed western larch wildlife wood products Wyoming