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. : Fo29-5/3E-PDF
"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.
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| Ministère/Organisme | Canada. Environment Canada. Canadian Forestry Service. Pacific Forest Research Centre. |
|---|---|
| Titre | 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. |
| Variante du titre | Development of survey design |
| Titre de la série | [Report] ; BC-R-3 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Cover title. Includes bibliographical references (page 14). Includes summary in French. |
| Information sur la publication | Victoria, B.C. : Environment Canada, Canadian Forestry Service, Pacific Forest Research Centre, March 1980. |
| Auteur / Contributeur | Bloomberg, W. J., author. Cumberbirch, Peter Mark, 1948- author. Wallis, G. W., author. |
| Description | 1 online resource (24 pages) : illustrations. |
| Numéro de catalogue |
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| Descripteurs | Trees Plant diseases Surveys |