. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. The estimated area and volume by vegetation type are similarly computed. To compute estimates for the conifer type, for example, all plots not classed as conifer are assigned a value of 0 for volume and area. The area of conifer type is 6,563 acres, the area of hardwoods is 7,932 acres, and the area of brush/open is 805 acres. The estimated total volume for each vegetation type is 143,448 ccf for conifer, 83,646 ccf for hardwood, and 3,623 ccf for the brush/open type respectively. Mapping and Un
. A primer on stand and forest inventory designs. Forests and forestry Mensuration; Forest surveys. The estimated area and volume by vegetation type are similarly computed. To compute estimates for the conifer type, for example, all plots not classed as conifer are assigned a value of 0 for volume and area. The area of conifer type is 6,563 acres, the area of hardwoods is 7,932 acres, and the area of brush/open is 805 acres. The estimated total volume for each vegetation type is 143,448 ccf for conifer, 83,646 ccf for hardwood, and 3,623 ccf for the brush/open type respectively. Mapping and Unmeasured Area Estimates—Areas outside the sampled and mapped strips are assumed to have the average conditions of the inventory unit as a whole ( ccf per acre). Within the mapped strips, unmeasured areas are assigned the average values for the stratum in which they fall. See figure 17. Cost Estimates—The costs are the same as for sys- tematic sampling. The only cost is the field cost. F = $2,275, or $0,149 per acre. Discussion—This technique was used in the early days of the USDA Forest Service, but is seldom used today. Line intersect sampling (a hybrid probability sample and a line transect) has been used to sample downed woody material to evaluate fire hazard potential (Brown 1974, De Vries 1986). Forest Boundary. Figure 17—Mapping showing measured (*), stratum average (s), and Forest average (a) volume (ccf) per acre based on the strip cruise inventory. 41. 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 Lund, H. Gyde; Thomas, Charles E. (Charles Eugene), 1940-; United States. Forest Service. [Washington, D. C. ?] : U. S. Dept. of Agriculture, Forest Service
Size: 1674px × 1493px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorunitedstatesforestservice, bookcentury1900, bookpublis
