. Annual report 1953. Forests and forestry Southern States. New Methods in Testing Stage Preliminary tests indicate that the labor costs in gum production might be reduced by more intensive methods of working trees over shorter periods of time. Experiments are under way to determine whether the labor requirements can be reduced by using higher streaks and higher con- centrations of sulfuric acid with fewer streaks per year or with fewer years of work per face. Proven Methods Tests of different streak heights and experience of commercial gum producers have demonstrated that for most operations
. Annual report 1953. Forests and forestry Southern States. New Methods in Testing Stage Preliminary tests indicate that the labor costs in gum production might be reduced by more intensive methods of working trees over shorter periods of time. Experiments are under way to determine whether the labor requirements can be reduced by using higher streaks and higher con- centrations of sulfuric acid with fewer streaks per year or with fewer years of work per face. Proven Methods Tests of different streak heights and experience of commercial gum producers have demonstrated that for most operations 3/^-inch is about the optimum streak height for use with bark chipping and treatment with 50 per- cent sulfuric acid at biweekly intervals on both slash and longleaf pine (fig. 12). This technique will permit k years of work on a face without reaching the "pulling ;. Figure 11.—Relation between cost of research and benefit to gum naval stores industry from development of bark chipping and acid treatment. Potential benefit estimated at 2-million dollars or more annually to be reached in i960. - 25 -. 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 Southeastern Forest Experiment Station (Asheville, N. C. ). Asheville, N. C. : Southeastern Forest Experiment Station, U. S. Dept. of Agriculture, Forest Service
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Keywords: ., bo, bookcentury1900, booksubjectforestsandforestrysouthernstates
