Soil Structure & Compaction

AUS-AMR-FOR-SSC General Moderate confidence

Benchmark Value

No specific value — see range

Range: 500 to 2000 kPa

Optimal Range: 500 to 2000

Direction: Lower is desirable ↓

Form: OptimalRange

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Contributing Benchmarks

CompositeFramework Primary MaximumOnly Guard UpperThreshold Guard MaximumOnly Guard UpperThreshold Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard Point Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard

Evidence & Context

Optimal Range: 500 – 2000 kPa (measured at or near field capacity). This range defines a healthy state for arid upland forest soils.

Metric Definition:

Penetrometer resistance (PR) measured at or near field capacity, indicating soil mechanical strength that affects root growth.

Benchmark Definition:

Optimal functional range of soil compaction balancing root growth and water retention in arid upland forests.

Justification:

Supported by evidence from Mediterranean analogue forests and biophysical principles indicating benefits of moderate compaction in water-limited systems.

Sources (1)

Preview of The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees | Arboriculture & Urban Forestry

The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees | Arboriculture & Urban Forestry Journal

Resistance and resilience of the forest soil microbiome to logging ...

View Source

Supporting Sources (1)

Additional references from the underlying research that informed this benchmark.

Preview of RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED, accessed July 30, 2025,

RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED, accessed July 30, 2025,

Direct Evidence Journal

Relationships between cone penetration resistance, bulk density, and moisture content in uncultivated, repacked, and cultivated hardsetting and non-hardsetting soils from the coastal lowlands of south-east Queensland, Australia

View Source

Context

Region Australia
Biome Arid Mountain Ranges & Uplands
Land Use Production Forestry
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

This range avoids the inefficiency of overly loose soils and stays safely below the 2500 kPa critical threshold where root growth is severely restricted. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-AMR-FOR-SSC family.