. Bitterbrush topping : shrub response and cost factors. Purshia tridentata. Figure 1.âBoise study area, Boise National ' â " Forest, Boise County, 'f Each fall, an estimate was also made of the percent of the entire canopy made up by the two sample branches. For example, if the total twig growth on the two branches of a particular shrub was 300 inches, and the estimator believed that these two branches made up 10 percent of the entire shrub, then there might be about 3,000 linear inches of twig growth on that shrub. The percent dead canopy of each sample shrub was estimated to th
. Bitterbrush topping : shrub response and cost factors. Purshia tridentata. Figure 1.âBoise study area, Boise National ' â " Forest, Boise County, 'f Each fall, an estimate was also made of the percent of the entire canopy made up by the two sample branches. For example, if the total twig growth on the two branches of a particular shrub was 300 inches, and the estimator believed that these two branches made up 10 percent of the entire shrub, then there might be about 3,000 linear inches of twig growth on that shrub. The percent dead canopy of each sample shrub was estimated to the nearest 10 percent prior to topping, and was reestimated each year thereafter. Figure 2.âSawtooth study area. Sawtooth National Forest, Twin Falls County, 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 Ferguson, Robert B. , 1928-; Intermountain Forest and Range Experiment Station (Ogden, Utah) 1n; Idaho. Fish and Game Dept. cn. Ogden, Utah : Intermountain Forest & Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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