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January 1, 2026Japanese Journal of Forest PlanningOpen Access

Regional site index curves for nationwide private and public Sugi (Cryptomeria japonica) forests to develop yield tables

Kazuo Hosoda Tomohiro Nishizono Fumiaki Kitahara Hiroshi Sasakawa Tomoko Furuta

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Key Points

The aim is to create regional site index curves for Sugi forests to assist in yield prediction.
Analyzed data from 5,730 survey points across private Sugi forests aged 1 to 100 years.
Compared 13 growth functions to establish appropriate site index curves.
Developed curves for 7 geographical regions and a common national curve.
Identified 6 suitable growth functions including Chapman-Richards and Korf for different growth evaluations.
Curves can be combined with density management diagrams for yield predictions based on various planting and thinning scenarios.

Implication

Develops site index curves to predict yields in Sugi forests, indicating management strategies.

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Cite This Study

Hosoda et al. (2026) studied this question.

synapsesocial.com/papers/69d892886c1944d70ce03f7b https://doi.org/10.20659/jjfp.a20260103

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Keep reading

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1Stand Structure and Thinning Strategies for Poorly Managed Private Conifer Plantations in Southern JapanOriginal Research · 2026
2Site Index Curves for Unthinned Norway Spruce Plantations in New YorkOriginal Research · 1988 · 3 citations
3Cross-sectional Area Increment of the Lower Trunk in Aged Sugi (<i>Cryptomeria japonica</i>) Trees: A Heightening TrendCross-Sectional Study · 2023
4Developing Biomass Growth Models for Chinese Fir Plantations Based on National Forest Inventory DataOriginal Research · 2026
5Site index and stand characteristic models for silver birch plantations in southern and central Finland2024 · 7 citations

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