DOI: 10.6084/m9.figshare.29818265.v1
title: Seedling growth and topographic data from a fertilization and GSSG experiment in <i>Cryptomeria japonica</i> plantations

description: This dataset contains seedling height measurements of <i>Cryptomeria japonica</i> collected over four years as part of a field experiment investigating the effects of fertilization and GSSG treatment on early growth in a reforested site. The data include information on treatment types, seedling height (cm), root collar diameter (mm), topographic indices (TRI, TPI, TWI, LS-Factor), and vegetation competition of individual seedlings. The study site was located in Ibaraki Prefecture, Japan, and the survey plot was approximately 200 meters in length. Measurements were conducted annually from year 1 to year 4 after planting.Variablessite: site: Individual seedling identification codes. The format “Sxx-y” indicates the block number (Sxx) and the individual seedling number within that subplot (y).position: 1 to 20 of the block positiontreatment: Control, Gultation, Fertilization, Gul+FertTRI_01m: Topographic Ruggedness Index derived from a 1 m resolution DEM.TRI_02m: Topographic Ruggedness Index derived from a 2 m resolution DEM.TRI_03m: Topographic Ruggedness Index derived from a 3 m resolution DEM.TRI_04m: Topographic Ruggedness Index derived from a 4 m resolution DEM.TRI_05m: Topographic Ruggedness Index derived from a 5 m resolution DEM.TPI_01m: Topographic Position Index derived from a 1 m resolution DEM.TPI_02m: Topographic Position Index derived from a 2 m resolution DEM.TPI_03m: Topographic Position Index derived from a 3 m resolution DEM.TPI_04m: Topographic Position Index derived from a 4 m resolution DEM.TPI_05m: Topographic Position Index derived from a 5 m resolution DEM.STWI_01m: Topographic Wetness Index calculated from a 1 m resolution DEM using SAGA GIS.STWI_02m: Topographic Wetness Index calculated from a 2 m resolution DEM using SAGA GIS.STWI_03m: Topographic Wetness Index calculated from a 3 m resolution DEM using SAGA GIS.STWI_04m: Topographic Wetness Index calculated from a 4 m resolution DEM using SAGA GIS.STWI_05m: Topographic Wetness Index calculated from a 5 m resolution DEM using SAGA GIS.LSF_01m: L-S factor calculated from a 1 m resolution DEM.LSF_02m: L-S factor calculated from a 2 m resolution DEM.LSF_03m: L-S factor calculated from a 3 m resolution DEM.LSF_04m: L-S factor calculated from a 4 m resolution DEM.LSF_05m: L-S factor calculated from a 5 m resolution DEM.D_20190513: Root collar diameter (mm) of C. japonica seedlings measured on May 13, 2019.D_20191125: Root collar diameter (mm) of C. japonica seedlings measured on November 11, 2019.D_20201203: Root collar diameter (mm) of C. japonica seedlings measured on December 3, 2020.D_20211126: Root collar diameter (mm) of C. japonica seedlings measured on November 26, 2021.D_20221101: Root collar diameter (mm) of C. japonica seedlings measured on November 1, 2022.H_20190513: Height (cm) of C. japonica seedlings measured on May 13, 2019.H_20191125: Height (cm) of C. japonica seedlings measured on November 11, 2019.H_20201203: Height (cm) of C. japonica seedlings measured on December 3, 2020.H_20211126: Height (cm) of C. japonica seedlings measured on November 26, 2021.H_20221101: Height (cm) of C. japonica seedlings measured on November 1, 2022.CV_20200817: Percent cover (0–100%) of competing vegetation surrounding each C. japonica seedling, measured on August 17, 2020.CV_20210712: Percent cover (0–100%) of competing vegetation surrounding each C. japonica seedling, measured on Juli 12, 2021.CV_20220810: Percent cover (0–100%) of competing vegetation surrounding each C. japonica seedling, measured on August 10, 2022.CVHmax_20200817: Maximum height (cm) of competing vegetation around each C. japonica seedling, measured on August 17, 2020.CVHmax_20210712: Maximum height (cm) of competing vegetation around each C. japonica seedling, measured on July 12, 2021.CVHmax_20220810: Maximum height (cm) of competing vegetation around each C. japonica seedling, measured on August 10, 2022.D2H_20190513: D2H (cm3) of C. japonica seedlings measured on May 13, 2019.D2H_20191125: D2H (cm3) of C. japonica seedlings measured on November 11, 2019.D2H_20201203: D2H (cm3) of C. japonica seedlings measured on December 3, 2020.D2H_20211126: D2H (cm3) of C. japonica seedlings measured on November 26, 2021.D2H_20221101: D2H (cm3) of C. japonica seedlings measured on November 1, 2022.HD_20190513: Height:Root collar diameter ratio of C. japonica seedlings measured on May 13, 2019.HD_20191125: Height:Root collar diameter ratio of C. japonica seedlings measured on November 11, 2019.HD_20201203: Height:Root collar diameter ratio of C. japonica seedlings measured on December 3, 2020.HD_20211126: Height:Root collar diameter ratio of C. japonica seedlings measured on November 26, 2021.HD_20221101: Height:Root collar diameter ratio of C. japonica seedlings measured on November 1, 2022.