# Brown 1997: Estimating Biomass and Biomass Change of Tropical Forests: a Primer (FAO Forestry Paper 134)

Brown, S. (1997). Estimating Biomass and Biomass Change of Tropical Forests: a Primer. FAO Forestry Paper 134. Rome: Food and Agriculture Organization of the United Nations. ISBN 92-5-103955-0.

- Link: https://www.fao.org/4/w4095e/w4095e00.htm
- Access: open access
- Copy we read: https://www.fao.org/4/w4095e/w4095e06.htm
- Status: current (link checked weekly); last checked 2026-11-01
- Page: https://treeallometry.org/sources/brown-1997/

## Equations from this source (4)

### Dry tropical zone AGB from DBH (Eq. 3.2.1)

Aboveground biomass for Tropical broadleaf trees (mixed species), Pantropical. Inputs: DBH. DBH 5–40 cm. 28 trees.

As printed (Eq. 3.2.1, Section 3.2.1 table):

> Y = exp{-1.996+2.32*ln(D)}

Page: https://treeallometry.org/equations/brown-1997-dry/

### Moist tropical zone AGB, power law (Eq. 3.2.4)

Aboveground biomass for Tropical broadleaf trees (mixed species), Pantropical. Inputs: DBH. DBH 5–148 cm. 170 trees.

As printed (Eq. 3.2.4, Section 3.2.1 table):

> Y = exp{-2.134+2.530*ln(D)}

Page: https://treeallometry.org/equations/brown-1997-moist-power/

### Moist tropical zone AGB, quadratic (Eq. 3.2.3)

Aboveground biomass for Tropical broadleaf trees (mixed species), Pantropical. Inputs: DBH. DBH 5–148 cm. 170 trees.

As printed (Eq. 3.2.3, Section 3.2.1 table):

> Y = 42.69-12.800(D)+1.242(D2)

Page: https://treeallometry.org/equations/brown-1997-moist-quadratic/

### Tropical pines AGB from DBH (Eq. 3.1.8 / 3.2.8)

Aboveground biomass for Pinus, Global. Inputs: DBH. DBH 2–52 cm. 63 trees.

As printed (Eq. 3.1.8, Section 3.2.1 table):

> Y(kg) = exp{-1.170+2.119*ln(D)}

Page: https://treeallometry.org/equations/brown-1997-pine/