|VOLUME TABLES OF EVERGREEN OAK (Q. ilex L.)|
VOLUME TABLES OF EVERGREEN OAK (Q. ilex L.)
Abstract: Double-entry and single-entry volume tables (tariffs) of evergreen oak (Quercus ilex L.) were produced for the territory of the Republic of Croatia. They were based on 425 model trees for large wood above 7 cm in diameter and a total volume above 3 cm in diameter. To determine the volume of trees, the Schumacher-Hall function was selected. Its regression model for the total volume (above 3 cm) is v=0.000072412٠d2.033282٠h0.796658, with multiple regression coefficient R=0.991 and coefficient of determination R2=98.2%, and for the volume of large wood (above 7 cm): v=0.000025565٠d2.467343٠h0.699012, with multiple regression coefficient R=0.977 and determination coefficient R2=95.5%. The arithmetic mean of the form factor is 0.674, and the values range from 0.409 to 1.081. Single-entry volume tables (tariffs) were generated based on the parameters of double-entry tables and construction of height curves.
Keywords: evergreen oak, volume tables, double-entry volume tables, single-entry volume tables, large wood, total volume, data analysis
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