Single- and Double-Entry Volume Equations for Turkey Oak (Quercus cerris L.) Stands in Bursa Regional Directorate of Forestry

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dc.contributor.authorSönmez, Turan
dc.contributor.authorGencal, Burhan
dc.contributor.authorCankaya, Ergin Cagatay
dc.date.accessioned2026-02-08T15:08:31Z
dc.date.available2026-02-08T15:08:31Z
dc.date.issued2023
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractTree volume estimates are the essential databank used in estimates of forest growth and revenue. In various workshops, symposiums, and general assemblies, it is emphasized that oaks with 18 species in Turkey should be handled on a species basis. For this purpose, in our study, equations were determined for the volume estimates of the Turkey oak (Quercus cerris L.) stands, which were distributed within the scope of the Bursa Regional Directorate of Forestry. Sample areas of all ages and site classes were selected through the data obtained from the management plans, and the required sampling distribution was made. Five single-entry tree volume equations and 40 double-entry tree volume equations proposed by different sources were tried. The most appropriate volume equations were determined according to their relative rankings created using seven different eligibility criteria (coefficient of determination, mean squared error, mean absolute percentage error, root mean square error, average absolute error, Akaike information criterion, and Schwarz’s Bayesian information criterion). As a result of the ranking, equation 5 was selected for single-entry tree volume equations and equation 34 was selected for double-entry tree volume equations. The results are R2 = .9586 for 34th equation and R2 = .9016 for 5th equation, respectively. The equations were compared with the test data, and it was seen that they could be used by the Regional Forest Directorate of Bursa. At the same time, it was compared with the ready-made double-entry volume tables developed and published earlier. As a result, it was determined that there were statistical differences in the volume tables.
dc.identifier.doi10.5152/forestist.2022.22010
dc.identifier.endpage62
dc.identifier.issn2602-4039
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85147738614
dc.identifier.scopusqualityN/A
dc.identifier.startpage51
dc.identifier.trdizinid1169318
dc.identifier.urihttps://doi.org/10.5152/forestist.2022.22010
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5064
dc.identifier.volume73
dc.identifier.wosWOS:000925176200006
dc.identifier.wosqualityN/A
dc.indekslendigikaynakTR-Dizin
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.relation.ispartofFORESTIST
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_TR-Dizin_20260207
dc.subjectBiyoloji
dc.subjectZiraat Mühendisliği
dc.titleSingle- and Double-Entry Volume Equations for Turkey Oak (Quercus cerris L.) Stands in Bursa Regional Directorate of Forestry
dc.typeArticle

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