. The composite type on the Apache National Forest. Forest management; Forests and forestry Arizona. 16 COMPOSITE TYPE OX THE APACHE NATIONAL FOEEST. addition to this it is often swell-butted. The pine has medium thick bark, but comparatively little taper, and the bole, especially at old age. fills out well. The difference in volume is even more pronounced than the differ- ence in merchantable length. Spruce, on account of its great taper, produces no merchantable log until it reaches a diameter of 14 inches. At this diameter western yellow pine has a merchantable. Fig. 3.—Growth in volume of
. The composite type on the Apache National Forest. Forest management; Forests and forestry Arizona. 16 COMPOSITE TYPE OX THE APACHE NATIONAL FOEEST. addition to this it is often swell-butted. The pine has medium thick bark, but comparatively little taper, and the bole, especially at old age. fills out well. The difference in volume is even more pronounced than the differ- ence in merchantable length. Spruce, on account of its great taper, produces no merchantable log until it reaches a diameter of 14 inches. At this diameter western yellow pine has a merchantable. Fig. 3.—Growth in volume of western yellow pine, Douglas fir, and blue spruce. length twice as great, and Douglas fir nearly as much. A better comparison of the volumes can be obtained if age is taken as a basis. Table 6 gives the volume of each species in both board and cubic measure at 10-year intervals. On account of the inaccuracies in the decimal "C" rule, or in fact, in any board foot measure, a more exact comparison of the three species may be made from the columns headed '•Volume, cubic ;. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Greenamyre, Harold H. (Harold Hubert), 1887-. Washington, D. C. : U. S. Dept. of Agriculture, Forest Service
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestm, bookyear1913
