# Miyakuni et al. 2004: Allometric Biomass Equations, Biomass Expansion Factors and Root-to-shoot Ratios of Planted Acacia mangium Willd. Forests in West Java, Indonesia

Miyakuni, K., Heriansyah, I., Heriyanto, N. M., & Kiyono, Y. (2004). Allometric Biomass Equations, Biomass Expansion Factors and Root-to-shoot Ratios of Planted Acacia mangium Willd. Forests in West Java, Indonesia. Journal of Forest Planning, 10(2), 69-76.

- DOI: https://doi.org/10.20659/jfp.10.2_69
- Access: open access
- Copy we read: https://www.jstage.jst.go.jp/article/jfp/10/2/10_KJ00007911299/_pdf
- Status: no retraction or correction notice recorded (Crossref is asked weekly); last checked 2026-11-02
- Page: https://treeallometry.org/sources/miyakuni-2004/

## Equations from this source (10)

### Planted Acacia mangium, West Java, aboveground biomass from D, 10-year stand (model A)

Aboveground biomass for Acacia mangium, Indonesia. Inputs: DBH. 16 trees.

As printed (Table 5, model A, stand age 10):

> Y = a·dbh^b; a = 0.3944, b = 2.0568, r2 = 0.9032

Page: https://treeallometry.org/equations/miyakuni-2004-agb-a-10yr/

### Planted Acacia mangium, West Java, aboveground biomass from D, 3-year stand (model A)

Aboveground biomass for Acacia mangium, Indonesia. Inputs: DBH. 15 trees.

As printed (Table 5, model A, stand age 3):

> Y = a·dbh^b; a = 0.0414, b = 2.7523, r2 = 0.9727

Page: https://treeallometry.org/equations/miyakuni-2004-agb-a-3yr/

### Planted Acacia mangium, West Java, aboveground biomass from D, 5-year stand (model A)

Aboveground biomass for Acacia mangium, Indonesia. Inputs: DBH. 12 trees.

As printed (Table 5, model A, stand age 5):

> Y = a·dbh^b; a = 0.2331, b = 2.1348, r2 = 0.9013

Page: https://treeallometry.org/equations/miyakuni-2004-agb-a-5yr/

### Planted Acacia mangium, West Java, aboveground biomass from D, 8-year stand (model A)

Aboveground biomass for Acacia mangium, Indonesia. Inputs: DBH. 16 trees.

As printed (Table 5, model A, stand age 8):

> Y = a·dbh^b; a = 0.0904, b = 2.4906, r2 = 0.9027

Page: https://treeallometry.org/equations/miyakuni-2004-agb-a-8yr/

### Planted Acacia mangium, West Java, aboveground biomass from D, all ages (model B)

Aboveground biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 5, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0472, b = 2.7055, r2 = 0.9914

Page: https://treeallometry.org/equations/miyakuni-2004-agb-b-all-ages/

### Planted Acacia mangium, West Java, branch biomass from D, all ages (model B)

Branch biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 3, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0046, b = 2.8669, r2 = 0.9359

Page: https://treeallometry.org/equations/miyakuni-2004-branch-b-all-ages/

### Planted Acacia mangium, West Java, leaf biomass from D, all ages (model B)

Foliage biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 2, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0502, b = 1.5503, r2 = 0.735

Page: https://treeallometry.org/equations/miyakuni-2004-leaf-b-all-ages/

### Planted Acacia mangium, West Java, root biomass from D, all ages (model B)

Root biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 6, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0058, b = 2.821, r2 = 0.9883

Page: https://treeallometry.org/equations/miyakuni-2004-root-b-all-ages/

### Planted Acacia mangium, West Java, stem biomass from D, all ages (model B)

Stem biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 4, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0323, b = 2.7515, r2 = 0.9921

Page: https://treeallometry.org/equations/miyakuni-2004-stem-b-all-ages/

### Planted Acacia mangium, West Java, total (above + below) biomass from D, all ages (model B)

Total biomass for Acacia mangium, Indonesia. Inputs: DBH. 59 trees.

As printed (Table 7, model B, stand age 3-10):

> Y = a·dbh^b; a = 0.0528, b = 2.7222, r2 = 0.992

Page: https://treeallometry.org/equations/miyakuni-2004-total-b-all-ages/