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dc.contributor.authorErcanlı, İlker
dc.contributor.authorKahriman, Aydın
dc.contributor.authorYavuz, Hakkı
dc.date.accessioned2019-12-06T07:23:21Z
dc.date.available2019-12-06T07:23:21Z
dc.date.issued2013en_US
dc.identifier.citationErcanlı, İ., Kahriman, A., and Yavuz, H. 2014. Dynamic base-age invariant site index models based on generalized algebraic difference approach for mixed Scotch pine (Pinus sylvestris L.) and Oriental beech (Fagus orientalis Lipsky) stands, Turkish Journal of Agriculture and Forestry, 38 (1):134-147.en_US
dc.identifier.urihttps://hdl.handle.net/11494/1843
dc.description.abstractData from stem analysis of 397 dominant trees (198 Scots pine and 199 Oriental beech) were used to evaluate dynamic base-age invariant site index models derived from Bertalanffy–Richards, Hossfeld, and Lundqvist–Korf functions with the generalized algebraic difference approach (GADA) for mixed Scots pine (Pinus sylvestris L.) and Oriental beech (Fagus orientalis Lipsky) stands. These functions were compared with respect to residuals of these models; specifically, the evaluation criteria were bias (– root mean square error (RMSE), absolute mean error (AME), adjusted coefficient of determination (R2 ), and Akaike information criterion. The best results were obtained with generalized algebraic difference equations derived from the base models of Bertalanffy–Richards for Oriental beech and Hossfeld for Scots pine. These selected models accounted for 95%–96% of the total variance in height–age relationships in dominant trees with bias of 0.049841 and 0.00171, RMSE of 1.55624 and 1.353736, AME of 0.940128 and 0.884034, and AIC of 723.55 and 1250.78 for Scots pine and Oriental beech, respectively. These dynamic base-age invariant site index models for the 2 tree species presented more effective and accurate polymorphic site index curves with multiple asymptotes than earlier site index models for Oriental beech and Scots pine. The important differences of height growth trend between developed base-age invariant site index models in this study and earlier site curves were determined by graphical comparisons for site index predictions. Therefore, the new dynamic base-age invariant site index models developed based on GADA methodology can be recommended for dominant height prediction and forest site quality evaluations in the mixed stands of these 2 species.en_US
dc.language.isoengen_US
dc.publisherTUBITAK Scientific & Technical Research Council Turkeyen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectGeneralized Algebraic Difference Approachen_US
dc.subjectScots Pineen_US
dc.subjectOriental Beechen_US
dc.subjectMixed Standsen_US
dc.subjectSite Index Modelen_US
dc.titleDynamic base-age invariant site index models based on generalized algebraic difference approach for mixed Scots pine (Pinus sylvestris L.) and Oriental beech (Fagus orientalis Lipsky) standsen_US
dc.typearticleen_US
dc.relation.journalTurkish Journal Of Agrıiculture And Forestryen_US
dc.departmentAÇÜen_US
dc.authorid0000-0003-4250-7371en_US
dc.authorid0000-0001-9696-1153en_US
dc.identifier.volume38
dc.identifier.issue1
dc.identifier.startpage134
dc.identifier.endpage147
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.doi10.3906/tar-1212-67en_US
dc.contributor.institutionauthor[0-Belirlenecek]en_US


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