Estimation of Site Index for Pinus thunbergii in Southern Region of Korea

Son, Yeong Mo; Lee, Kwang Soo; Yoo, Byung Oh; Pyo, Jung Kee

doi:10.14397/jals.2013.47.6.119

Cited by 6 publications

(9 citation statements)

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“…In the study of Lumbres et al (2011), the data was derived from full dataset of National Forest Inventory in 2007 and 2008. However, in comparison of height-age model, the curve line in the study of Son et al (2013) was located above the curve line of this study, and the difference was noticeable when age was bigger than 50 year (Fig. 4).…”

Section: Model Comparisonmentioning

confidence: 47%

“…To find the parameters of models, PROC NLIN procedure on SAS 9.4 software was performed (SAS Institute Inc. 2013). After finding the parameters of each models, the curve shape and coefficients of best-fit model in this study were compared with the previous studies (Lumbres et al 2011;Son et al 2013).…”

Section: Model Selection and Validationmentioning

confidence: 99%

“…2). To check the suitability, the parameters of this study were compared with the parameters of the previous studies: Lumbres et al (2011) for four height-DBH models and Son et al (2013) for Chapman-Richards and Weibull height-age models. As a result, all the parameters were similar, no abnormal parameters were found.…”

Section: Model Developmentmentioning

confidence: 99%

“…That is, Chapman-Richards model of height-DBH equation was compared to that of Lumbres et al (2011), and Weibull model of height-age equation was compared to that of Son et al (2013). First of all, the shape of the model curves were shown in Fig.…”

Section: Model Comparisonmentioning

confidence: 99%

“…4). The analyzed dataset in the study of Son et al (2013) was collected from Gyeongsang and Jeolla provinces, and the number of sample trees was 24 trees. Overall, the models of this study presented the similar curve patterns to the curves of the previous studies.…”

Section: Model Comparisonmentioning

confidence: 99%

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Height Growth Models for Pinus thunbergii in Jeju Island

Park¹,

Lee²,

Seo³

et al. 2015

Journal of Forest and Environmental Science

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Height growth models for Pinus thunbergii in Jeju Island were developed in this study using four widely used nonlinear growth models; Exponential, Modified Logistic, Chapman-Richards, and Weibull. All functions were found to be significant at the 1% level. Chapman-Richards model for height-DBH allometry and Weibull model for height-age allometry was chosen as the best model on the all validation. All the model curves showed the similar pattern. Additionally, there was no abnormal pattern when the previous studies were compared. Therefore, these models are highly expected to be used to estimate the tree height using DBH or age for Pinus thunbergii especially in Jeju Island.

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Section: Model Comparisonmentioning

confidence: 47%

Section: Model Selection and Validationmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Section: Model Comparisonmentioning

confidence: 99%

Section: Model Comparisonmentioning

confidence: 99%

See 3 more Smart Citations

Height Growth Models for Pinus thunbergii in Jeju Island

Park¹,

Lee²,

Seo³

et al. 2015

Journal of Forest and Environmental Science

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Estimating carbon storage and CO₂ absorption by developing allometric equations for Quercus acuta in South Korea

Kim

Lee

2017

Forest Science and Technology

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This study was conducted to estimate C storage and CO 2 absorption by developing allometric equations for Quercus acuta in South Korea. Carbon content and CO 2 absorption were estimated according to climate change using data such as volume, stem density, and biomass expansion factor (BEF). Three kinds of BEFs were applied for this calculation: the national factor (NF, 1.22); the factor in this study (1.3275); and the biomass expansion regression equation (BRE) in this study. BRE among BEFs was developed to calculate BEF related to diameter at breast height (DBH) because BEF had a significantly positive relationship with DBH; the bigger DBH grew, the higher BEF increased. When applying the NF, C content and CO 2 absorption were the lowest as 64.0455 t C ha ¡1 and 234.6840 t CO 2 ha ¡1 , respectively; whereas these were 69.6865 t C ha ¡1 and 255.5165 t CO 2 ha ¡1 for the factor in this study. The highest values of C content and CO 2 absorption were shown as 74.9280 t C ha ¡1 and 274.7365 t CO 2 ha ¡1 when using the BRE. Carbon content prediction equations were also developed using these BEFs. Thus, BRE is suitable for developing an allometric equation for C content prediction with the greatest R 2 adjusted of 0.9815.

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Evaluation of stem taper models fitted for Japanese cedar (Cryptomeria japonica) in the subtropical forests of Jeju Island, Korea

Lumbres

Seo

Joo

et al. 2017

Forest Science and Technology

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This study was conducted to evaluate the performance of the five stem taper models in predicting the diameter over bark at any given height (d) and total volume of Japanese cedar (Cryptomeria japonica D.Don) in the subtropical forests of Korea. The four fit statistics used in this study were standard error of estimate (SEE), mean bias (E), mean absolute bias (MAB), and coefficient of determination (R 2 ). For the lack-of-fit statistics, SEE, MAB, and E of the five models in predicting d in the different relative height classes and in predicting the total volume in the different diameter at breast height (D) classes were determined. Results of the model evaluation indicated that the Kozak88 stem taper model had the best performance in most of the fit statistics followed by Kozak02 stem taper model. The Kozak88 model also provided the best performance in the lack-of-fit statistics having the best SEE, MAB, and E in predicting d in most of the relative height classes. This model consistently performed well in estimating the total volume of Japanese cedar in the different D classes as compared to other stem taper and volume models. These stem taper equations could serve as a management tool for forest managers to accurately predict the d, merchantable stem volumes, and total stem volumes of the standing trees of Japanese cedar in the southern plantation of Korea.

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Estimation of Site Index for Pinus thunbergii in Southern Region of Korea

Cited by 6 publications

References 0 publications

Height Growth Models for Pinus thunbergii in Jeju Island

Height Growth Models for Pinus thunbergii in Jeju Island

Estimating carbon storage and CO₂ absorption by developing allometric equations for Quercus acuta in South Korea

Evaluation of stem taper models fitted for Japanese cedar (Cryptomeria japonica) in the subtropical forests of Jeju Island, Korea

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Estimation of Site Index for Pinus thunbergii in Southern Region of Korea

Cited by 6 publications

References 0 publications

Height Growth Models for Pinus thunbergii in Jeju Island

Height Growth Models for Pinus thunbergii in Jeju Island

Estimating carbon storage and CO2 absorption by developing allometric equations for Quercus acuta in South Korea

Evaluation of stem taper models fitted for Japanese cedar (Cryptomeria japonica) in the subtropical forests of Jeju Island, Korea

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Product

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Estimating carbon storage and CO₂ absorption by developing allometric equations for Quercus acuta in South Korea