Soil Structure & Compaction

AUS-ASP-AGR-SSC General Moderate confidence

Benchmark Value

2500 kPa
Thresholds: Lower: —, Upper: 2500
Direction: Higher is desirable ↑
Form: UpperThreshold

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

Contributing Benchmarks

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

Evidence & Context

Upper Detrimental Threshold: A penetrometer resistance above 2,500 kPa indicates severe compaction that effectively prevents root growth, leading to a state of ecological dysfunction and loss of productivity.

Metric Definition:

Penetrometer resistance above which root growth is severely restricted, indicating ecological dysfunction.

Benchmark Definition:

This threshold marks the penetrometer resistance above which soil compaction severely restricts root growth and causes ecological dysfunction in arid agricultural soils.

Justification:

This threshold is widely accepted as the point where root elongation is severely restricted or ceases, representing a critical ecological tipping point.

Sources (1)

Preview of GRDC Deep Ripping Fact Sheet (2019)
GRDC Deep Ripping Fact Sheet (2019) Journal

GRDC Deep Ripping Fact Sheet (2019)

View Source

Supporting Sources (29)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Soil compaction and controlled traffic considerations in ..., accessed July 30, 2025,
(PDF) Soil compaction and controlled traffic considerations in ..., accessed July 30, 2025,
Contextual Support

Ripping Mallee soils, what are the production benefits? - Agronomy Australia Proceedings, accessed August 28, 2025

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Preview of $3.5M national project to examine ways to boost soil organic matter - CSIRO
$3.5M national project to examine ways to boost soil organic matter - CSIRO
Contextual Support Government

$3.5M national project to examine ways to boost soil organic matter - CSIRO, accessed August 28, 2025

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Preview of 6. LAND CAPABILITY CLASSES ON THE FORTH MAP, accessed August 28, 2025
6. LAND CAPABILITY CLASSES ON THE FORTH MAP, accessed August 28, 2025
Contextual Support

physical soil constraints - grdc, accessed August 28, 2025

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Preview of High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia - CSIRO Publishing, accessed July 7, 2025
High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia - CSIRO Publishing, accessed July 7, 2025
Contextual Support Journal

High clay contents, dense soils, and spatial variability are the principal subsoil constraints to cropping the higher rainfall land in south-eastern Australia - CSIRO Publishing, accessed July 26, 2025,

View Source
Preview of Is soil compaction reducing wheat yields in the Victorian Mallee? | Birchip Cropping Group, accessed August 28, 2025
Is soil compaction reducing wheat yields in the Victorian Mallee? | Birchip Cropping Group, accessed August 28, 2025
Contextual Support Journal

Is soil compaction reducing wheat yields in the Victorian Mallee? | Birchip Cropping Group, accessed August 28, 2025

View Source
Preview of Long-term no tillage alleviates subsoil compaction and drought-induced mechanical impedance** - International Agrophysics, accessed August 28, 2025
Long-term no tillage alleviates subsoil compaction and drought-induced mechanical impedance** - International Agrophysics, accessed August 28, 2025
Contextual Support Journal

Long-term no tillage alleviates subsoil compaction and drought-induced mechanical impedance** - International Agrophysics, accessed August 28, 2025

View Source
Preview of Long-term no-till trial delivers data legacy | GroundCover - GRDC Ground Cover, accessed August 28, 2025
Long-term no-till trial delivers data legacy | GroundCover - GRDC Ground Cover, accessed August 28, 2025
Contextual Support GreyLiterature

Long-term no-till trial delivers data legacy | GroundCover - GRDC Ground Cover, accessed July 7, 2025,

View Source
Preview of Meningie East – Field Healthy Soils Update Thursday 4th of March including lunch, accessed July 7, 2025
Meningie East – Field Healthy Soils Update Thursday 4th of March including lunch, accessed July 7, 2025
Contextual Support GreyLiterature

Promoting soil health in dryland agriculture by increasing cropping intensity - Agronomy Australia Proceedings, accessed August 28, 2025

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Preview of National Guidance on Acid Sulfate Soils - Water Quality Australia
National Guidance on Acid Sulfate Soils - Water Quality Australia
Contextual Support Journal

Managing soils - Department of Primary Industries and Regional Development

View Source
Preview of Regenerative Agriculture - a literature review on the practices and mechanisms used to improve soil health - DPIRD's Digital library, accessed August 5, 2025,
Regenerative Agriculture - a literature review on the practices and mechanisms used to improve soil health - DPIRD's Digital library, accessed August 5, 2025,
Contextual Support

Regenerative Land Management - HEALTHY SOILS AUSTRALIA

View Source
Preview of Regenerative Agriculture - Nuffield Farming Scholarships, accessed August 28, 2025
Regenerative Agriculture - Nuffield Farming Scholarships, accessed August 28, 2025
Contextual Support Journal

(PDF) Soil Bulk Density and Penetration Resistance Under Different Tillage and Crop Management Systems and Their Relationship With Barley Root Growth - ResearchGate, accessed August 28, 2025

View Source
Preview of Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 5, 2025,
Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 5, 2025,
Contextual Support Journal

Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 28, 2025,

View Source
Preview of Regenerative opportunities for building soil biological resilience – a ..., accessed May 11, 2025
Regenerative opportunities for building soil biological resilience – a ..., accessed May 11, 2025
Contextual Support GreyLiterature

Soil and fertilizer phosphorus: Effects on plant P supply and mycorrhizal development - Canadian Science Publishing, accessed August 28, 2025

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Preview of Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed August 28, 2025
Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed August 28, 2025
Contextual Support

Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed August 28, 2025

View Source
Preview of Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Contextual Support Journal

Cover cropping impacts on soil water and carbon in dryland cropping system - PMC

View Source
Preview of Report card on sustainable natural resource use in agriculture, accessed July 6, 2025,
Report card on sustainable natural resource use in agriculture, accessed July 6, 2025,
Contextual Support

Managing soils | Department of Primary Industries and Regional Development - dpird, accessed August 28, 2025

View Source
Preview of Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed August 2, 2025,
Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed August 2, 2025,
Contextual Support Journal

A Review of the Effects of Soil Compaction and Amelioration Treatments on Landscape Trees | Arboriculture & Urban Forestry, accessed July 22, 2025,

View Source
Preview of Seedbed Soil Structure Decline | Fact Sheets | soilquality.org.au, accessed August 28, 2025
Seedbed Soil Structure Decline | Fact Sheets | soilquality.org.au, accessed August 28, 2025
Contextual Support Government

Seedbed Soil Structure Decline | Fact Sheets | soilquality.org.au

View Source
Preview of Soil bulk density and penetration resistance under different tillage and crop management systems, and their relationship with barley root growth, accessed August 28, 2025
Soil bulk density and penetration resistance under different tillage and crop management systems, and their relationship with barley root growth, accessed August 28, 2025
Methodology Source GreyLiterature

Soil bulk density and penetration resistance under different tillage and crop management systems, and their relationship with barley root growth, accessed August 28, 2025

View Source
Preview of Soil Compaction Explained - Soil Quality Knowledge Base, accessed August 2, 2025,
Soil Compaction Explained - Soil Quality Knowledge Base, accessed August 2, 2025,
Contextual Support

grdc.com.au

View Source
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, accessed July 27, 2025,

View Source
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 GreyLiterature

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

View Source
Preview of Soil Stability Explained - Soil Quality Knowledge Base, accessed August 28, 2025
Soil Stability Explained - Soil Quality Knowledge Base, accessed August 28, 2025
Contextual Support GreyLiterature

Soil Stability Explained - Soil Quality Knowledge Base, accessed August 28, 2025

View Source
Preview of Soil Structure Decline - Tas | Fact Sheets | soilquality.org.au, accessed August 4, 2025,
Soil Structure Decline - Tas | Fact Sheets | soilquality.org.au, accessed August 4, 2025,
Contextual Support GreyLiterature

Soil Structure Decline - Tas | Fact Sheets | soilquality.org.au, accessed August 28, 2025

View Source
Preview of Strategic tillage of a long-term, no-till soil has little impact on soil characteristics or crop growth over five years
Strategic tillage of a long-term, no-till soil has little impact on soil characteristics or crop growth over five years
Contextual Support Journal

What is Regenerative Agriculture? - Soils For Life, accessed August 13, 2025,

View Source
Preview of The effects of compaction and soil drying on penetrometer ..., accessed August 28, 2025
The effects of compaction and soil drying on penetrometer ..., accessed August 28, 2025
Contextual Support Journal

PORTABLE PENETROMETER FOR AGRICULTURAL SOIL: SENSITIVITY TEST TO IDENTIFY CRITICAL COMPACTION DEPTH - SciELO, accessed August 28, 2025

View Source
Preview of The effects of compaction and soil drying on penetrometer resistance - ResearchGate, accessed August 2, 2025,
The effects of compaction and soil drying on penetrometer resistance - ResearchGate, accessed August 2, 2025,
Contextual Support Journal

soils - of the australian alps, accessed August 11, 2025

View Source
Preview of The grazier's guide to pastures - NSW Department of Primary Industries, accessed August 28, 2025
The grazier's guide to pastures - NSW Department of Primary Industries, accessed August 28, 2025
Contextual Support Journal

The grazier's guide to pastures - NSW Department of Primary Industries, accessed August 28, 2025

View Source
Preview of What is Erosion? Effects of Soil Erosion and Land Degradation - World Wildlife Fund, accessed August 28, 2025
What is Erosion? Effects of Soil Erosion and Land Degradation - World Wildlife Fund, accessed August 28, 2025
Contextual Support Government

Soil erosion: causes and effects | ontario.ca, accessed August 28, 2025

View Source

Context

  • Region Australia
  • Biome Arid Shrublands & Stony Plains
  • Land Use Agricultural Crop Production
  • Assessment Pristine Reference
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 21 Mar 2026

Notes

Values above this threshold lead to catastrophic failure of water-cycling function and loss of drought resilience.

Related Benchmarks

Other benchmarks in the AUS-ASP-AGR-SSC family.

1500 kPa Moderate
Agricultural Crop Production · Pristine Reference
MaximumOnly Active v1
500 kPa Moderate
Agricultural Crop Production · Pristine Reference
LowerThreshold Active v1