Non-destructive measurement techniques for taper equation development: a study case in the Spanish Northern Iberian Range

Rodríguez, Francisco; Lizarralde, I.; Fernández-Landa, Alfredo; Condés, Sonia

doi:10.1007/s10342-013-0739-5

Cited by 25 publications

(16 citation statements)

References 13 publications

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“…The Smalian method was used to calculate volume of each log sections (Rodriguez et al 2014). Merchantable volume (vm) was considered as the sum of each log section plus stump volume.…”

Section: Data Setmentioning

confidence: 99%

Volume equations for Khaya ivorensis A. Chev. plantations in Brazil

Oliveira

Ribeiro

Filho

et al. 2018

An. Acad. Bras. Ciênc.

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African mahogany (Khaya spp.) plantations are in expansion in Brazil and in the world. This fact justifies the need for studies related to its growth and yield. This paper aimed to evaluate the performance of single-entry and double-entry models for estimating merchantable and total volume for Khaya ivorensis plantations before the first thinning (7 years) and expected final cut (15 years). Volume data was from 100 and 46 trees in Minas Gerais and Pará states, respectively, by using an electronic dendrometer (Criterion RD 1000). Observed volumes were calculated by Smalian's formula. To validate the optical dendrometer, 10 trees were felled and had their volume measured, and compared with the volumes measured indirectly. The results showed that observed and estimated volumes were statistically equal, and that double-entry models were more precise than single-entry models. Schumacher and Hall model was the best equation to estimate merchantable volume for first thinning and for final cut in Minas Gerais stands. Spurr logarithmized model was the best equation to estimate total volume for first thinning and Spurr model for final cut in Pará stands. All chosen equations can be used to quantify merchantable and total volumes of Khaya ivorensis grown under similar conditions.

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“…The Smalian method was used to calculate volume of each log sections (Rodriguez et al 2014). Merchantable volume (vm) was considered as the sum of each log section plus stump volume.…”

Section: Data Setmentioning

confidence: 99%

Volume equations for Khaya ivorensis A. Chev. plantations in Brazil

Oliveira

Ribeiro

Filho

et al. 2018

An. Acad. Bras. Ciênc.

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“…Os fatores relacionados à aproximação da árvore e inclinação do instrumento, e que ocasionaram erros nas medições, foram relatados por Silva et al (2017). Tais ocorrências também foram destacadas por Rodriguez et al (2013), ao considerarem as distâncias correspondentes à metade e igual à altura da árvore entre o observador e a árvore, para medições de diâmetro visando obtenção do volume, sendo sugerido o uso da maior distância, uma vez que resultou em estimativas mais precisas para o volume de árvores em pé.…”

Section: Estatísticaunclassified

“…Bonazza et al (2015), realizando a medição de árvores com o Criterion RD 1000 ® e considerando diferentes distâncias de medição (10, 14 e 18 m) para árvores de 13 anos com altura média de 17,2 m e 21 anos com altura média de 26,3 m (semelhante à média do presente estudo), notaram que ambas idades apresentaram erros menores nas estimativas de volume individuais de árvores com a distância de 18 m. No entanto, as medidas foram mais exatas nos indivíduos com 21 anos. Rodriguez et al (2013), testando técnicas de medição não destrutiva para desenvolvimento de equações taper, verificaram que a distância tomada em relação à árvore é um fator limitante na eficiência do método e, para garantir melhores mensurações do volume, a distância deve ser semelhante à altura da árvore.…”

Section: Estatísticaunclassified

“…A distância entre o mensurador e a árvore não foi um critério avaliado no presente trabalho, sendo escolhidas de acordo com o local onde se tinha uma melhor visualização da maior parte do fuste. As distâncias foram em média de 23 m (desvio padrão ± 2,2 m), sendo que as árvores medidas tinham em média altura de 27 m (desvio padrão ± 2,5 m), não sendo possível um distanciamento maior, conforme recomendado por Rodriguez et al (2013), pois em distâncias muito grandes há limitação de medição do instrumento. Além disso, os galhos nas posições mais elevadas do fuste também podem dificultar a medição, devido à dificuldade de visualização dos mesmos, problema ainda maior quando mais distante da árvore a ser medida.…”

Section: Estatísticaunclassified

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Cubagem de árvores em pé com dendrômetro óptico em sistema de integração lavoura-pecuária-floresta

et al. 2019

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The objective of this study was to evaluate the accuracy of the Criterion RD 1000® optical dendrometer in a crop-livestock-forest integration system for measuring total volume and sections with bark of eucalyptus trees. Selected trees were felled, having their actual strict volumes obtained. The Smalian method was used for destructive Non-destructive scaling was using carried out using criterion. Bartlett's test for total volume (p-value 0.5125) and diameter along the stem (p-value 0.1891) was found to be homogeneous. There were no statistical differences between the total volumes obtained by the destructive method compared to the non-destructive and the average form factor. The diameters along the bole obtained by the destructive scaling were the same as those obtained by the non-destructive scaling. For the volume by sections of the bole, it was verified that only in the sections closest to the top and considering the volume up to the top, there was difference with the actual volume. However it corresponded to a small proportion of the total volume (9%). Measurements obtained with the Criterion RD 1000® showed no trend, providing efficient measurements for both diameter and volume along the bole.

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“…Tree volume prediction is an key tool for estimating volume at different merchantable heights (Dieguez-Aranda et al 2006), estimating woody biomass and assessment of carbon stocks (Zianis et al, 2005;Castedo-Dorado et al 2012), forest management and planning (Rodríguez et al 2014), monitoring forest health and productivity (Gómez-García et al, 2015), and future projections of the forest products industry (de-Miguel et al 2012). Thus, flexible and reliable volume estimation methods that also can be easily integrated to any growth and yield models are needed in order to estimate the single tree and stand volumes in Turkey (de-Miguel et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparison of tree volume equations for brutian pine stands in Eğirdir district

Özçelık¹,

Altinkaya²

2019

Turkish Journal of Forestry | Türkiye Ormancılık Dergisi

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In this study, tree volume equations have been developed for Brutian pine (Pinus brutia Ten.). The data was obtained from the natural brutian pine stands in Eğirdir region. Totally of 405 trees are sampled and randomly separated into the two groups. Since there is no real independent dataset, twofold evaluation scheme was applied and the prediction performance of 18 models was evaluated. For this purpose, four different criteria values were used: mean error (MD), mean absolute error (MAD), coefficient of determination (R 2) and root mean square error (RMSE). The prediction performances of the models were evaluated on the basis of relative ranking. As a result of the evaluations, the most successful results were obtained with Model 4, while the most unsuccessful results were obtained with model 6. The obtained results suggested that Model 4 should be used to more reliable volume predictions for natural brutian pine stands in Eğirdir Region

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Non-destructive measurement techniques for taper equation development: a study case in the Spanish Northern Iberian Range

Cited by 25 publications

References 13 publications

Volume equations for Khaya ivorensis A. Chev. plantations in Brazil

Volume equations for Khaya ivorensis A. Chev. plantations in Brazil

Cubagem de árvores em pé com dendrômetro óptico em sistema de integração lavoura-pecuária-floresta

Comparison of tree volume equations for brutian pine stands in Eğirdir district

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