Basal Area — Benchmark Detail

Benchmark Value

18 m²/ha

Direction: Higher is desirable ↑

Form: Point

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context. The scoring engine uses 19 benchmarks together — the OptimalRange form drives the primary score, while 18 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary Point Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard MaximumOnly Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard MinimumOnly Guard Point Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard

Evidence & Context

Proposed Reference Value: 18 m²/ha

Metric Definition:

Basal area, defined as the cross-sectional area of tree stems at breast height per unit of land (e.g., m²/ha)

Benchmark Definition:

This benchmark represents the basal area of tree stems at breast height per hectare in agricultural crop production systems on Australian tropical/subtropical maritime islands, balancing ecological integrity with agricultural function.

Justification:

Derived proxy benchmark based on synthesis of analogous ecosystems and forestry management principles

Sources (2)

"A Review of Traditional Agroforestry in Micronesia" (Manner, 1992) Journal

"A Review of Traditional Agroforestry in Micronesia" (Manner, 1992)

View Source

"Basal area (m²/ha) for different tropical rain forests of the Far East" (Jaffré & Veillon, in Adansonia, 2021) Journal

"Basal area (m²/ha) for different tropical rain forests of the Far East" (Jaffré & Veillon, in Adansonia, 2021)

View Source

Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 21, 2025

Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 21, 2025

Contextual Support Journal

Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 21, 2025

View Source

Forestry stocking guides for temperate hardwood stands

Contextual Support Journal

Forestry stocking guides for temperate hardwood stands

View Source

Lord Howe Island, NSW 2898 Telephone: (02) 65632066, accessed August 4, 2025,

Contextual Support Journal

UN Food and Agriculture Organization (FAO) definition of forest canopy cover minimum

View Source

Study in a South Indian agricultural landscape on vegetation cover and crop yield

Contextual Support GreyLiterature

Study in a South Indian agricultural landscape on vegetation cover and crop yield

View Source

Context

Region Australia
Biome Tropical & Subtropical Maritime Islands
Land Use Agricultural Crop Production
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 8 Jun 2026

Notes

This benchmark is a derived proxy representing a 'best-on-offer' condition for ecologically functional agricultural crop production on Australian tropical/subtropical islands, as no direct field measurements exist. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TMI-AGR-BAS family.