Soil Structure & Compaction

AUS-ASP-AGR-SSC General Moderate confidence

Benchmark Value

1500 kPa
Direction: Higher 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.

Evidence & Context

The final benchmark recommendation is detailed in the table below. It is derived from an understanding that in arid environments, optimal soil structure is not merely the absence of compaction but a state of resilient aggregation that facilitates root growth and water infiltration while resisting erosion.

Metric Definition:

Soil penetrometer resistance (PR) measured at field capacity, indicating mechanical impedance to root growth.

Benchmark Definition:

Penetrometer resistance measures soil compaction affecting root growth and soil structure in arid shrublands under agricultural crop production. This benchmark represents an achievable state balancing root access with structural stability under best-practice regenerative agriculture.

Justification:

The benchmark is synthesized from multiple sources including GRDC guidelines and peer-reviewed studies, representing an achievable state under best-practice regenerative agriculture in analogous semi-arid systems.

Sources (1)

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

Deep Ripping - GRDC

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

View Source
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

View Source
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

6. LAND CAPABILITY CLASSES ON THE FORTH MAP

View Source
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

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

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

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

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

View Source
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, accessed July 17, 2025

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 Agriculture Program restoring soil pH case study: Macdonald, Whites Flat/Koppio

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

Regenerative Agriculture - Nuffield Farming Scholarships

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 July 20, 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

Regenerative opportunities for building soil biological resilience – a case study in the low-rainfall zone in Southern Australia - GRDC

View Source
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

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

Technical Note No.3 - Effects of Residue Management and No-Till on Soil Quality - Natural Resources Conservation Service

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

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

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

high soil strength - fact sheet - GRDC

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

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 Government

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

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

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

The effects of compaction and soil drying on penetrometer ...

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 GreyLiterature

soils - of the australian alps

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

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

What is Erosion? Effects of Soil Erosion and Land Degradation - World Wildlife Fund

View Source

Context

  • Region Australia
  • Biome Arid Shrublands & Stony Plains
  • Land Use Agricultural Crop Production
  • Assessment Conservation Target
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 6 Jun 2026

Notes

Lower Critical Threshold: 500 kPa. Upper Detrimental Threshold: 2500 kPa. The benchmark is set below the level where root growth becomes restricted, balancing root access with structural stability.

Related Benchmarks

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

2500 kPa Moderate
Agricultural Crop Production · Conservation Target
MaximumOnly Active v3
500 kPa Moderate
Agricultural Crop Production · Conservation Target
MaximumOnly Active v2