Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin
The objective of this study is to estimation of stem volume for Caucasian fir - Oriental spruce mixed stands in Artvin-Ardanuç region of Turkey. For this purpose, the data obtained from 213 felled sample trees in total, which are 107 Caucasian fir and 106 Oriental spruce, were used. The fitted equat...
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| Format: | Article |
| Language: | English |
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Isparta University of Applied Sciences Faculty of Forestry
2023-03-01
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| Series: | Turkish Journal of Forestry |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/download/article-file/796008 |
| _version_ | 1797857448443248640 |
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| author | Aydın Kahriman Abdurrahman Şahin Celal Yavuz Çakır |
| author_facet | Aydın Kahriman Abdurrahman Şahin Celal Yavuz Çakır |
| author_sort | Aydın Kahriman |
| collection | DOAJ |
| description | The objective of this study is to estimation of stem volume for Caucasian fir - Oriental spruce mixed stands in Artvin-Ardanuç region of Turkey. For this purpose, the data obtained from 213 felled sample trees in total, which are 107 Caucasian fir and 106 Oriental spruce, were used. The fitted equations were ranked according to goodness-of-fit criterias (adjusted coefficient of determination (R_(adj.)^2), standard deviation of residuals (Sy.x), average residuals (D ̅), average absolute residuals (|D ̅ |), absolute mean error percentage (OMH%) and total error percentage (TH%)) and the most successful equations were selected based on relative ranks. The R_(adj.)^2 values of the most successful single- and double-entry tree volume equations for Caucasian fir and Oriental spruce were 0.982 and 0.988 - 0.981 and 0.992, respectively. The best fitted tree volume equations were tested with independent data set for both tree species using “Wilcoxon T Test” within the border of Ardanuç Forest District Directorates, and concluded that these equations can be used for these stands at the 0.05 significant level. It is proposed to construct both single and double entry tree volume equations for the both tree species. |
| first_indexed | 2024-04-09T20:56:53Z |
| format | Article |
| id | doaj.art-d08e7e04b39a461aafb3bcffb303f998 |
| institution | Directory Open Access Journal |
| issn | 2149-3898 |
| language | English |
| last_indexed | 2024-04-09T20:56:53Z |
| publishDate | 2023-03-01 |
| publisher | Isparta University of Applied Sciences Faculty of Forestry |
| record_format | Article |
| series | Turkish Journal of Forestry |
| spelling | doaj.art-d08e7e04b39a461aafb3bcffb303f9982023-03-29T18:29:05ZengIsparta University of Applied Sciences Faculty of ForestryTurkish Journal of Forestry2149-38982023-03-0124111010.18182/tjf.6128221656Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, ArtvinAydın Kahriman0Abdurrahman Şahin1Celal Yavuz Çakır2ARTVİN ÇORUH ÜNİVERSİTESİ, ORMAN FAKÜLTESİARTVİN ÇORUH ÜNİVERSİTESİ, ORMAN FAKÜLTESİ, ORMAN MÜHENDİSLİĞİ BÖLÜMÜ, ORMAN AMENAJMANI ANABİLİM DALIArtvin Orman Bölge Müdürlüğü, Şavşat Orman İşletme MüdürlüğüThe objective of this study is to estimation of stem volume for Caucasian fir - Oriental spruce mixed stands in Artvin-Ardanuç region of Turkey. For this purpose, the data obtained from 213 felled sample trees in total, which are 107 Caucasian fir and 106 Oriental spruce, were used. The fitted equations were ranked according to goodness-of-fit criterias (adjusted coefficient of determination (R_(adj.)^2), standard deviation of residuals (Sy.x), average residuals (D ̅), average absolute residuals (|D ̅ |), absolute mean error percentage (OMH%) and total error percentage (TH%)) and the most successful equations were selected based on relative ranks. The R_(adj.)^2 values of the most successful single- and double-entry tree volume equations for Caucasian fir and Oriental spruce were 0.982 and 0.988 - 0.981 and 0.992, respectively. The best fitted tree volume equations were tested with independent data set for both tree species using “Wilcoxon T Test” within the border of Ardanuç Forest District Directorates, and concluded that these equations can be used for these stands at the 0.05 significant level. It is proposed to construct both single and double entry tree volume equations for the both tree species.https://dergipark.org.tr/tr/download/article-file/796008over-bark stem volumetree volume equationwilcoxon t testmixed standsrelative rankingkabuklu gövde hacmiağaç hacim denklemiwilcoxon t testikarışık meşcererölatif sıralama |
| spellingShingle | Aydın Kahriman Abdurrahman Şahin Celal Yavuz Çakır Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin Turkish Journal of Forestry over-bark stem volume tree volume equation wilcoxon t test mixed stands relative ranking kabuklu gövde hacmi ağaç hacim denklemi wilcoxon t testi karışık meşcere rölatif sıralama |
| title | Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin |
| title_full | Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin |
| title_fullStr | Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin |
| title_full_unstemmed | Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin |
| title_short | Volume equations for Caucasian fir - Oriental spruce mixed stands in Ardanuç, Artvin |
| title_sort | volume equations for caucasian fir oriental spruce mixed stands in ardanuc artvin |
| topic | over-bark stem volume tree volume equation wilcoxon t test mixed stands relative ranking kabuklu gövde hacmi ağaç hacim denklemi wilcoxon t testi karışık meşcere rölatif sıralama |
| url | https://dergipark.org.tr/tr/download/article-file/796008 |
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