Soil Structure & Compaction

AUS-AKW-CON-SSC General Moderate confidence

Benchmark Value

500 kPa

Direction: Lower is desirable ↓

Form: MaximumOnly

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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Benchmark for Best Available Condition: Due to a lack of direct field data, a proxy benchmark for penetration resistance in a healthy, uncompacted state is established at < 500 kPa, measured at field capacity.

Metric Definition:

Penetrometer resistance measured at field capacity representing soil compaction and structure.

Benchmark Definition:

Proxy benchmark for soil penetration resistance indicating minimal anthropogenic compaction in Arid Karstic Woodlands & Shrublands under conservation.

Justification:

Derived from empirical data for uncultivated, native sandy loam soils at field capacity from Australian research due to lack of direct data in the target biome.

Sources (1)

Preview of RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED, accessed July 27, 2025,

RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED, accessed July 27, 2025, Journal

RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED

Supporting Sources (24)

Additional references from the underlying research that informed this benchmark.

Preview of ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 27, 2025,

ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 27, 2025,

Contextual Support Journal

ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data, accessed July 27, 2025,

Preview of Australia's protected areas - DCCEEW, accessed August 4, 2025,

Australia's protected areas - DCCEEW, accessed August 4, 2025,

Contextual Support Government

Collaborative Australian Protected Areas Database: protected area data - DCCEEW

Preview of Australian Soil Classification edition 3 - CALCAROSOLS, accessed July 26, 2025

Australian Soil Classification edition 3 - CALCAROSOLS, accessed July 26, 2025

Contextual Support

Distribution, characteristics and management of calcareous soils

Preview of Australian Soils and Landscapes | Monitoring & Data | TERN - esoil.io, accessed July 27, 2025,

Australian Soils and Landscapes | Monitoring & Data | TERN - esoil.io, accessed July 27, 2025,

Contextual Support Government

Categories - Environmental management - CSIRO Data Access Portal

Preview of Best Management Practices to Use on Karst and Silurian Soil - Crops and Soils, accessed July 23, 2025,

Best Management Practices to Use on Karst and Silurian Soil - Crops and Soils, accessed July 23, 2025,

Contextual Support Government

Australian Soil: Definition, Classification, Types and Quality - Access EP, accessed July 16, 2025,

Preview of Effect of combined soil water and external load on soil compaction - CSIRO Publishing, accessed July 7, 2025,

Effect of combined soil water and external load on soil compaction - CSIRO Publishing, accessed July 7, 2025,

Contextual Support Journal

What is Regenerative Agriculture? - Soils For Life, accessed July 22, 2025

Preview of Floristic and structural assessment of Australian rangeland ..., accessed July 23, 2025,

Floristic and structural assessment of Australian rangeland ..., accessed July 23, 2025,

Contextual Support

Floristic and structural assessment of Australian rangeland vegetation with standardized plot-based surveys - Semantic Scholar, accessed July 27, 2025,

Preview of kidman resources limited may 2017 earl grey lithium deposit soil and landform assessment - EPA WA, accessed July 27, 2025,

kidman resources limited may 2017 earl grey lithium deposit soil and landform assessment - EPA WA, accessed July 27, 2025,

Contextual Support Journal

Calcic soils and calcretes in the southwestern United States - USGS Publications Warehouse, accessed July 27, 2025,

Preview of Managing soils - Department of Primary Industries and Regional Development, accessed August 12, 2025

Managing soils - Department of Primary Industries and Regional Development, accessed August 12, 2025

Contextual Support Government

Repairing gully erosion in Western Australia | Department of Primary ..., accessed July 17, 2025

Preview of Nullarbor - DBCA Library

Nullarbor - DBCA Library

Contextual Support Journal

Nullarbor - DBCA Library, accessed July 24, 2025

Preview of Nullarbor bioregion - DCCEEW, accessed July 27, 2025

Nullarbor bioregion - DCCEEW, accessed July 27, 2025

Contextual Support Journal

Nullarbor bioregion - DCCEEW, accessed July 24, 2025

Preview of Nullarbor Plain - Wikipedia, accessed July 25, 2025,

Nullarbor Plain - Wikipedia, accessed July 25, 2025,

Contextual Support GreyLiterature

Nullarbor Plain - Wikipedia, accessed July 24, 2025

Preview of Relationship among compaction, moisture and penetration resistance in horticultural soil. - CABI Digital Library, accessed July 27, 2025,

Relationship among compaction, moisture and penetration resistance in horticultural soil. - CABI Digital Library, accessed July 27, 2025,

Contextual Support Journal

Relationship among compaction, moisture and penetration resistance in horticultural soil. - CABI Digital Library, accessed July 27, 2025,

Preview of Relationships between Some Soil Quality Indicators in Different Agricultural Soils from Varamin, Iran - CABI Digital Library, accessed July 27, 2025,

Relationships between Some Soil Quality Indicators in Different Agricultural Soils from Varamin, Iran - CABI Digital Library, accessed July 27, 2025,

Contextual Support Journal

Relationships between Some Soil Quality Indicators in Different Agricultural Soils from Varamin, Iran - CABI Digital Library, accessed July 27, 2025,

Preview of Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )

Contextual Support Government

Semi-arid woodlands (grassy sub-formation) | NSW Environment, Energy and Science

Preview of Soil and Landscape Grid of Australia - CSIRO, accessed July 30, 2025,

Soil and Landscape Grid of Australia - CSIRO, accessed July 30, 2025,

Contextual Support Government

Soil and Landscape Grid of Australia - CSIRO

Preview of Soil compaction - Queensland Government publications, accessed August 2, 2025,

Soil compaction - Queensland Government publications, accessed August 2, 2025,

Contextual Support Journal

Deep roots and soil structure - PMC - PubMed Central

Preview of Soil condition | NSW State of the Environment, accessed August 10, 2025,

Soil condition | NSW State of the Environment, accessed August 10, 2025,

Contextual Support Government

Analysing water sensitive urban design options - Australian Water Association

Preview of Soil health - Penetrometer - Department for Environment and Water, accessed August 2, 2025,

Soil health - Penetrometer - Department for Environment and Water, accessed August 2, 2025,

Contextual Support Journal

Soil health - Department for Environment and Water

Preview of Soil Penetration Resistance and Tree Root Development - UWE Bristol Research Repository, accessed July 27, 2025,

Soil Penetration Resistance and Tree Root Development - UWE Bristol Research Repository, accessed July 27, 2025,

Contextual Support GreyLiterature

Soil Penetration Resistance and Tree Root Development - UWE Bristol Research Repository

Preview of Soil Penetration Resistance as a Soil Health Indicator - SDSU Extension - South Dakota State University, accessed August 4, 2025,

Soil Penetration Resistance as a Soil Health Indicator - SDSU Extension - South Dakota State University, accessed August 4, 2025,

Contextual Support Government

Soil compaction and strength; measurement methods and influences on perennial grass growth.

Preview of TERN - Australia's Terrestrial Ecosystem Research Network, accessed July 30, 2025,

TERN - Australia's Terrestrial Ecosystem Research Network, accessed July 30, 2025,

Contextual Support Government

Australia's State of the Forests Report 2018 - DAFF, accessed July 31, 2025,

Preview of ternaustralia/ausplotsR: R package to interact with TERN AusPlots data - GitHub, accessed July 15, 2025

ternaustralia/ausplotsR: R package to interact with TERN AusPlots data - GitHub, accessed July 15, 2025

Contextual Support

ausplotsR: quickstart guide to basic analysis of TERN AusPlots vegetation data

Preview of The relationships between land management practices and soil condition and the quality of ecosystem services delivered from agri - DAFF, accessed July 27, 2025,

The relationships between land management practices and soil condition and the quality of ecosystem services delivered from agri - DAFF, accessed July 27, 2025,

Contextual Support GreyLiterature

Desert Pavement | EBSCO Research Starters, accessed July 27, 2025,

Context

Region Australia
Biome Arid Karstic Woodlands & Shrublands
Land Use Conservation / Protected Natural Areas
Assessment Pristine Reference
Vegetation Woodland
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

No direct penetrometer resistance data exists for reference sites in this specific biome. The value represents a state of minimal anthropogenic compaction. No upper detrimental threshold — higher values indicate more compaction and are less desirable.

Related Benchmarks

Other benchmarks in the AUS-AKW-CON-SSC family.