Crown width and crown eccentricity distance of large and old-growth trees of black pine (Pinus thunbergii), camphor (Cinnamomum camphora), chinquapin (Castanopsis sieboldii) and some other species
The first column includes the Japanese name of the tree species. The second column includes the scientific name of the tree species. Column 3 includes the data of girth at breast height. Column 4 includes data on the increase in girth at breast height. Column 5 includes the data of the slope distance between the two ends of the long diameter of the projected crown. Column 6 includes the data of the slope angle between the two ends of the long diameter of the projected crown. Column 7 includes the slope distance data between the two ends of the short diameter of the projected crown. Column 8 includes the slope angle data between the two ends of the short diameter of the projected crown. Column 9 includes data on the horizontal distance from the intersection of the long and short diameters of the crown to the tree stem, i.e., the crown eccentricity distance.
For the third column, girth was measured on December 9-10, 2023 for black pine and on December 10-11, 2022 for the other tree species. For the increase in girth in column 4, the one-year increase is shown from December 10-11, 2022 to December 9-10, 2023 for black pine, and the three-year increase from November 30-December 1, 2019 to December 10-11, 2022 for the other tree species. Data in columns 5 through 9 were measured on December 9-10, 2023.
The photo shows one of the camphor trees measured.
The staffs of the Manazuru Town planned and executed this measurement and created the main data file. Dr. Takashi Masaki, a researcher at the Forestry and Forest Products Research Institute, extracted a portion of the data from that file and compiled it into this data file. Thus, the copyright holder of the data presented here is the Manazuru Town. Please see RELATED MATERIALS 1 for more detail.
