00000nam 2200000zi 4500 9.870423 CaOODSP 20241203113647 m o d f cr ||||||||||| 190322e198003##bcca #ob f000 0 eng d 0709-9991 CaOODSP eng rda CaOODSP eng fre eng n-cn--- Fo29-5/3E-PDF Bloomberg, W. J., author. A ground-survey method for estimating loss caused by Phellinus weirii root rot. I. Development of survey design / W.J. Bloomberg, P.M. Cumberbirch and G. W Wallis. Development of survey design Victoria, B.C. : Environment Canada, Canadian Forestry Service, Pacific Forest Research Centre, March 1980. 1 online resource (24 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier [Report] ; BC-R-3 Cover title. Includes bibliographical references (page 14). "A transect line sampling system comprising sets (grids) of Iines was developed to estimate the incidence, distribution and area of root rot caused by Phellinus weirii (Murr.) Gilbertson in Douglas-fir stands. Estimates of total area of root rot were derived from intersection length and probability of occurrence; the latter was also used to estimate area and number of infection centers by size class. In simulated stands, two methods of measuring infection centers, radial and linear, gave accuracies of 96-109 and 94-114% of true area, respectively"--Summary, page 2. Includes summary in French. gccst Trees gccst Plant diseases gccst Surveys Cumberbirch, Peter Mark, 1948- author. Wallis, G. W., author. Canada. Environment Canada. Canadian Forestry Service. Pacific Forest Research Centre. Report (Pacific Forest Research Centre) BC-R-3 (CaOODSP)9.870394 PDF 16.90 MB https://publications.gc.ca/collections/collection_2019/eccc/Fo29-5-3-eng.pdf