Basal Area — Benchmark Detail

Benchmark Value

4 m²/ha

Range: 3 to 5 m²/ha

Optimal Range: 3 to 5

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 16 benchmarks together — the OptimalRange form drives the primary score, while 15 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary OptimalRange Guard Point Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard MinimumOnly Guard UpperThreshold Guard LowerThreshold Guard UpperThreshold Guard OptimalRange Guard UpperThreshold Guard

Evidence & Context

A value of 4.0 m²/ha is proposed as a robust and defensible benchmark.

Metric Definition:

Basal Area (BA) is a standard measure of stand density, defined as the sum of the cross-sectional area of tree stems at a standard height (1.3 m, or breast height) per unit of land area, typically expressed as square metres per hectare (m²/ha).

Benchmark Definition:

This benchmark represents the optimal basal area for a regenerative cropping system in Australia's Arid Mountain Ranges & Uplands, indicating a sustainable and healthy tree density under active crop production.

Justification:

The derivation of this optimal range and benchmark is supported by triangulating data from various sources, constrained by empirical evidence at both its lower and upper bounds, making it a robust and non-arbitrary estimate.

Sources (1)

Preview of Derived from synthesis of Sudmeyer & Flugge (2005), Scanlan & Burrows (1990), and Sustainable Farms (2022) guidelines.

Derived from synthesis of Sudmeyer & Flugge (2005), Scanlan & Burrows (1990), and Sustainable Farms (2022) guidelines. Journal

Sudmeyer & Flugge (2005) 27

View Source

Context

Region Australia
Biome Arid Mountain Ranges & Uplands
Land Use Agricultural Crop Production
Assessment Pristine Reference
Evidence Type TargetCondition

Lifecycle

Status Active
Version 1
Effective From 19 Mar 2026

Notes

No direct benchmark exists for this specific context. The functional range is constrained by a lower critical threshold of approximately 2.0-3.0 m²/ha, below which ecosystem services are minimal, and an upper detrimental threshold of approximately 5.0 m²/ha, above which severe competition for water causes unsustainable crop yield loss.

Related Benchmarks

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