Effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs in a mountainous region in Japan

Aruga, Kazuhiro; Hiyamizu, Gyo; Nakahata, Chikara; Saito, Masashi

doi:10.1007/s11676-013-0414-1

Cited by 16 publications

(9 citation statements)

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“…However, aggregating subcompartments would improve operational efficiency and reduce operation costs by establishing road networks and promoting mechanization although this study did not consider. It is difficult to find out increases on operational efficiency and reduction of operation costs by aggregating subcompartments (Aruga et al, 2013a), but the system should be improved to consider this.…”

Section: Discussionmentioning

confidence: 99%

Estimating Availability of Logging Residues Using Forest Management Records at Aggregated Stands of Nasushiobara City in Tochigi Prefecture, Japan

Uemura

Aruga

Kanetsuki³

2015

FORMATH

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Abstract:Using forest management records from 2005 to 2010, this study compared supply potentials and available logging residue amounts from profitable aggregated stands in Nasushiobara city in Tochigi prefecture with those from profitable subcompartments. Supply potentials from precommercial, commercial thinning, and final felling operations were 39,584 tons, 10,376 tons, and 3,385 tons, respectively. Available amounts at 3,000, 6,000, and 10,000 yen/ton were estimated to be 2,920 tons, 3,495 tons, and 13,334 tons from profitable subcompartments and 2,628 tons, 5,143 tons, and 29,940 tons from profitable aggregated stands, respectively. The available logging residue amounts were increased according to logging residue prices and for aggregated stands. Considering the subsidy, available amounts at 3,000, 6,000, and 10,000 yen/ton were increased to 20,526 tons, 34,981 tons, and 45,175 tons, respectively. The annual available logging residue amounts with a 3,000-yen/ton logging residue price were 3,421 tons/year over the expected demand of logging residues of 2,000 tons/year. Furthermore, the annual available logging residue amounts with a 6,000-yen/ton and a 10,000-yen/ton logging residue price were 5,830 tons/year and 7,529 tons/year over the expected demand for woody biomass of 5,000 tons/year. The supply potential and availability of logging residues, particularly from precommercial thinning operations, were significantly increased from 2009 because of the new tax that started in April 2008.

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Section: Discussionmentioning

confidence: 99%

Estimating Availability of Logging Residues Using Forest Management Records at Aggregated Stands of Nasushiobara City in Tochigi Prefecture, Japan

Uemura

Aruga

Kanetsuki³

2015

FORMATH

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“…Direct and other costs in the stands C (USD) were estimated (Nakahata et al 2014). Forwarding costs were estimated using forwarding distances LE (m) (Aruga et al 2013).…”

Section: Estimation Of Costsmentioning

confidence: 99%

“…Direct and other costs in the stands C (USD) were estimated (Nakahata et al 2014). Forwarding costs were estimated using forwarding distances LE (m) (Aruga et al 2013 (2) where A was the stand area (ha). Strip-road expenses OCR (USD/m) were estimated as follows (Sawaguchi 1996).…”

Section: Estimation Of Costsmentioning

confidence: 99%

Numerical examination of the optimal bucking method to maximize profits applied in Nasu town, Tochigi Prefecture, Japan

Aruga

Nakahata²,

Saito³

2019

European Journal of Forest Engineering

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In this study, the optimal bucking methods were numerically applied to Nasu town, and the factors of effects on profitability of commercial thinning operations and feasibility of extracting small sized logs were discussed. As a result, commercial thinning operations could be conducted on 18% (818 ha) and 54% (2427 ha) of 35 and 45 years old forests, respectively. On the other hand, pre-commercial thinning operation would be conducted on 81% (3666 ha) and 46% (2089 ha) of 35 and 45 years old forests. This shows current situation of Japanese forestry where nearly all the thinning operations conducted were pre-commercial. Stands with extracting small sized logs accounted for approximately ten percent of the total forest area. Extracted small sized logs from 35 years old forests were more than those from 45 years old forests although saw logs from 35 years old forest were less than those from 45 years old forests. The areas of stands with extracting small sized logs were increased according to the more gentle slope and shorter forwarding distances. Thus, it was clear that the reduction of forwarding distances by establishing forest road networks were effective in order to increase stands with extracting small sized logs.

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“…Este último análisis es uno de los más efectivos por que cuantifica el nivel de crecimiento aéreo de un individuo (Aruga et al, 2013) y el efecto de condiciones ambientales del sitio (Vyas et al, 2010). Además, es una variable fisioló-gica clave para el desarrollo de modelos de crecimiento (Demarez, Duthoit, Baret, Weiss y Dedieu, 2008;Chianucci, Cutini, Corona y Puletti, 2014), fijación de carbono (Liu, Pattey y Admiral., 2013) y dinámica de desarrollo de especies y poblaciones (Poblete-Echeverría, Fuentes, Ortega-Farias, Gonzalez-Talice y Yuri, 2015; Vyas et al, 2010).…”

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“…Entre los estudios desarrollados para evaluar el efecto de la labranza en el IAF de cultivos forestales se destaca el realizado por Aruga et al (2013), quienes evaluaron los efectos de la labranza con más de tres especies forestales en Japón, encontrando aumentos de IAF en suelos mecanizados. Por su parte Engler et al (2016), con plantaciones dendroenergéticas de Eucalipto, encontró aumento en la productividad de biomasa y de IAF de 10% a 15% en suelos labrados.…”

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Efectos de las actividades de labranza en el índice de área foliar en una plantación de Tectona grandis en la zona norte de Costa Rica

Valverde

Guevara-Bonilla

Arias‐Aguilar

et al. 2017

MYB

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Tectona grandis es una de las especies más utilizadas en los proyectos de reforestación en Costa Rica y ha sido plantada en sitios con problemas de capas adensadas en el perfil del suelo que retrasan el crecimiento de las plantaciones; por esta razón se hace necesario el desarrollo de actividades de labranza que mejoren las condiciones del suelo y favorezcan la productividad. En el presente estudio se evaluaron los efectos en el diámetro, altura total e índice de área foliar (IAF) de ocho tratamientos de labranza (testigo, testigo con dolomita, labrado con uno, tres y cinco cinceles tanto a 25 cm como a 40 cm de profundidad en combinación con dolomita) aplicados durante 2013 en una plantación de T. grandis. Tres años después de la labranza, no se encontraron diferencias significativas en el diámetro y en altura de los árboles (en promedio 11,74 cm y 11,1 m respectivamente). En cambio, el IAF mostró la formación de dos agrupaciones de tratamientos, una conformada por el testigo y testigo con dolomita y otra por individuos con suelo labrado. La primera agrupación presentó IAF menores a 3,80 m2 m-2, con correlaciones de IAF-altura inferiores a 15% y modelos alométricos con errores estándar altos; esto se debió a la heterogeneidad de los individuos causada por el estrés generado por las condiciones de compactación en el suelo. En contraste, los individuos con suelo labrado presentaron IAF superiores a 4,5 m2 m-2, con correlaciones de IAF-altura superiores a 56% y modelos alométricos con errores estándar menores a 0,20; el aumento se atribuye al proceso de reactivación del crecimiento de los individuos producto del mejoramiento en las propiedades del suelo.

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Effects of aggregating forests, establishing forest road networks, and mechanization on operational efficiency and costs in a mountainous region in Japan

Cited by 16 publications

References 0 publications

Estimating Availability of Logging Residues Using Forest Management Records at Aggregated Stands of Nasushiobara City in Tochigi Prefecture, Japan

Estimating Availability of Logging Residues Using Forest Management Records at Aggregated Stands of Nasushiobara City in Tochigi Prefecture, Japan

Numerical examination of the optimal bucking method to maximize profits applied in Nasu town, Tochigi Prefecture, Japan

Efectos de las actividades de labranza en el índice de área foliar en una plantación de Tectona grandis en la zona norte de Costa Rica

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