. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. FOREST DISEASE SURVEYS. 6 In most cases the appraisal of a timber-sale area is based somewhat low in respect to the total feet board measure of sound material, principally on account of the unknown amount of defect or rot to be encountered and sometimes partially for other causes, foremost of which is the desire to prevent overestimation. In timber surveys the estimating of timber is performed by mem- bers of the party who have been trained to estimate stands of varying mixtures, age
. [Bulletins on forest pathology : from Bulletin , Washington, , 1913-1925]. Trees; Plant diseases. FOREST DISEASE SURVEYS. 6 In most cases the appraisal of a timber-sale area is based somewhat low in respect to the total feet board measure of sound material, principally on account of the unknown amount of defect or rot to be encountered and sometimes partially for other causes, foremost of which is the desire to prevent overestimation. In timber surveys the estimating of timber is performed by mem- bers of the party who have been trained to estimate stands of varying mixtures, age, and soundness and who are thoroughly capable of. Fig. 2.—Fruiting bodies of Trametes pini on lodgepole pine. Notice the swell- ing of the trunk where the fruiting bodies are attached. (Photographed by G. G. Hedgcock.) judging the board-feet contents of trees within reasonable limits of error. The addition to the party of an expert cruiser has been made as a means of aiding the estimators in this work and checking their results. The determination of the correct cull percentage due to rot is the aim of this arrangement in the crew. In certain types and ages of stand the estimate may come close to the true scale, but, again, too small a percentage is deducted for cull due to rot, and consequently the estimate runs too high. A. sale con- tractor figuring possibly on a conservative margin and accepting the. 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 United States. Dept. of Agriculture. [Washington : U. S. Dept. of Agriculture]
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherwashi, bookyear1913
