earticle

영어

This study is about statistical analysis for factors affecting DBH Growth in species of major trees data. Pine forests and nut pine forests used the DBH data for six years from 2014 to 2020. And larch forests used the DBH data for six years from 2013 to 2019. We take growth of the DBH of each species for response variable, and degree of thinning and level of trees, age-class(of trees), age for the covariates. We focus on comparing the difference of the DBH growth according to each covariates. We use ANOVA for analysis of the difference in the amount of growth in DBH, Tukey's multiple comparisons for post analysis, and regression trees for analysis of a major effect on the growth of DBH, and clustering analysis for the growth of DBH according to age. We get some results that the effects of the thinning increase the growth of DBH and there is a difference in the growth of trees according to the level of trees and age-class.