Soil Structure & Compaction

AUS-AKW-LVG-SSC General Moderate confidence

Benchmark Value

2500 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. The scoring engine uses 13 benchmarks together — the OptimalRange form drives the primary score, while 12 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

The Grains Research & Development Corporation (GRDC) provides a diagnostic framework that classifies soil strength based on penetrometer resistance. In this framework, a value of < 500 kPa (< 0.5 MPa) is defined as "Not compacted" or "Loose," a state in which root growth is not affected. This value serves as the most credible, scientifically published proxy for an un-compacted soil condition in the Australian context.

Metric Definition:

Penetrometer resistance (PR), measured in kilopascals (kPa), quantifies soil mechanical impedance affecting root growth.

Benchmark Definition:

A state of minimal soil compaction measured by penetrometer resistance indicating loose or un-compacted soil in arid karstic woodlands and shrublands under livestock grazing.

Justification:

Selected as the 'best available condition' because the inherent physical fragility of arid karstic soils means their health is critically dependent on maintaining a structure as close as possible to an undisturbed state.

Sources (1)

Preview of How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers, accessed August 5, 2025,
How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers, accessed August 5, 2025, Journal

Managing Grazing to Restore Soil Health, Ecosystem ... - Frontiers

View Source

Supporting Sources (28)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) PENETROMETERS TO DETERMINE THE RESISTANCE TO PENETRATION IN OXISOL IN PASTURE LAND IN THE CERRADO - ResearchGate, accessed July 24, 2025
(PDF) PENETROMETERS TO DETERMINE THE RESISTANCE TO PENETRATION IN OXISOL IN PASTURE LAND IN THE CERRADO - ResearchGate, accessed July 24, 2025
Contextual Support Journal

final report - MLA, accessed July 24, 2025

View Source
Preview of Add a heading - Great Barrier Reef Foundation, accessed July 24, 2025
Add a heading - Great Barrier Reef Foundation, accessed July 24, 2025
Contextual Support GreyLiterature

Add a heading - Great Barrier Reef Foundation, accessed July 24, 2025

View Source
Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Contextual Support Journal

Root Structure and Functioning for Efficient Acquisition of Phosphorus: Matching Morphological and Physiological Traits

View Source
Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 24, 2025
Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 24, 2025
Contextual Support Journal

Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed July 24, 2025

View Source
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

View Source
Preview of Calcareous Soils Initiative - GRDC, accessed July 22, 2025,
Calcareous Soils Initiative - GRDC, accessed July 22, 2025,
Contextual Support Government

Calcareous Soils Initiative - GRDC, accessed July 24, 2025

View Source
Preview of Can simple, on-ground vegetation and soil measures reliably indicate the health of rangelands? An application in Australia's semi-arid woodlands - CSIRO Publishing, accessed July 30, 2025
Can simple, on-ground vegetation and soil measures reliably indicate the health of rangelands? An application in Australia's semi-arid woodlands - CSIRO Publishing, accessed July 30, 2025
Contextual Support Journal

on-ground vegetation and soil measures reliably indicate the health of rangelands? An application in Australia's semi-arid woodlands - CSIRO Publishing

View Source
Preview of Compaction | VRO - Victorian Resources Online, accessed August 4, 2025,
Compaction | VRO - Victorian Resources Online, accessed August 4, 2025,
Contextual Support

3- Build and maintain soil nutrients to improve soil fertility and health in all pasture zones

View Source
Preview of Compaction | VRO - Victorian Resources Online, accessed July 24, 2025
Compaction | VRO - Victorian Resources Online, accessed July 24, 2025
Contextual Support Journal

Compaction | VRO - Victorian Resources Online, accessed July 24, 2025

View Source
Preview of Do grazing intensity and herbivore type affect soil health? Insights from a semi-arid productivity gradient, accessed July 24, 2025
Do grazing intensity and herbivore type affect soil health? Insights from a semi-arid productivity gradient, accessed July 24, 2025
Contextual Support Journal

Soil acidification | .Meat & Livestock Australia, accessed August 5, 2025,

View Source
Preview of Effects of soil degradation on infiltration rates in grazed semiarid rangelands of northeastern Patagonia, Argentina - project bedrock
Effects of soil degradation on infiltration rates in grazed semiarid rangelands of northeastern Patagonia, Argentina - project bedrock
Contextual Support Journal

Effects of Grazing on Water Erosion, Compaction and Infiltration on Grasslands - MDPI

View Source
Preview of Final report - MLA, accessed July 19, 2025,
Final report - MLA, accessed July 19, 2025,
Contextual Support

Queensland Government target of 70% late dry season ground cover for grazing lands 13

View Source
Preview of How do I manage the impact of compaction? - Soil Health Knowledgebase, accessed July 24, 2025
How do I manage the impact of compaction? - Soil Health Knowledgebase, accessed July 24, 2025
Contextual Support Government

Grazing management to reduce soil damage - Agriculture Victoria

View Source
Preview of Managing, soil, pasture… - Kangaroo Island - Landscape SA, accessed July 24, 2025
Managing, soil, pasture… - Kangaroo Island - Landscape SA, accessed July 24, 2025
Contextual Support Government

Managing, soil, pasture… - Kangaroo Island - Landscape SA, accessed July 24, 2025

View Source
Preview of Potential Geoheritage Values of Landscapes in the Australian Drylands - DCCEEW, accessed July 23, 2025,
Potential Geoheritage Values of Landscapes in the Australian Drylands - DCCEEW, accessed July 23, 2025,
Contextual Support Journal

Wetlands | Environment, land and water | Queensland Government, accessed July 24, 2025

View Source
Preview of Progressive rehabilitation and closure plan schedule for P-PRCP-100812653 - NET, accessed July 18, 2025,
Progressive rehabilitation and closure plan schedule for P-PRCP-100812653 - NET, accessed July 18, 2025,
Contextual Support Journal

Ian Partridge - FutureBeef, accessed July 24, 2025

View Source
Preview of Protect your soil from compaction - NSW Department of Primary Industries, accessed August 4, 2025,
Protect your soil from compaction - NSW Department of Primary Industries, accessed August 4, 2025,
Contextual Support

The grazier's guide to pastures - NSW Department of Primary Industries, accessed July 24, 2025

View Source
Preview of Rangelands Living Skin - Final report, accessed July 21, 2025,
Rangelands Living Skin - Final report, accessed July 21, 2025,
Contextual Support Journal

The effect of soil and pasture attributes on rangeland infiltration rates in northern Australia, accessed July 24, 2025

View Source
Preview of Restoration of degraded grazing country in the semi-arid areas of ..., accessed July 10, 2025,
Restoration of degraded grazing country in the semi-arid areas of ..., accessed July 10, 2025,
Contextual Support Journal

Pasture and grazing land: assessment of sustainability using invertebrate bioindicators

View Source
Preview of Restoration of degraded grazing country in the semi-arid areas of NSW, accessed July 24, 2025
Restoration of degraded grazing country in the semi-arid areas of NSW, accessed July 24, 2025
Contextual Support Government

Restoration of degraded grazing country in the semi-arid areas of NSW, accessed July 24, 2025

View Source
Preview of Review: The effects of soil compaction on root penetration, pasture growth and persistence - Journal of New Zealand Grasslands, accessed July 24, 2025
Review: The effects of soil compaction on root penetration, pasture growth and persistence - Journal of New Zealand Grasslands, accessed July 24, 2025
Contextual Support Journal

Review: The effects of soil compaction on root penetration, pasture growth and persistence - Journal of New Zealand Grasslands, accessed July 24, 2025

View Source
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, accessed July 12, 2025, )

View Source
Preview of SOIL CARBON EDITION - North Central Catchment Management Authority, accessed July 28, 2025,
SOIL CARBON EDITION - North Central Catchment Management Authority, accessed July 28, 2025,
Contextual Support Government

Soil Compaction - Tas | Fact Sheets | soilquality.org.au

View Source
Preview of Soil Carbon Saturation: What Do We Really Know? - PMC - PubMed Central
Soil Carbon Saturation: What Do We Really Know? - PMC - PubMed Central
Contextual Support

Soil Compaction of Pastures - King Conservation District, accessed July 24, 2025

View Source
Preview of Soil Health Assessment Part IV: Soil Penetration Resistance and Plant Roots – Soil and Water Conservation Laboratory Manual - New Prairie Press Open Book Publishing, accessed August 11, 2025
Soil Health Assessment Part IV: Soil Penetration Resistance and Plant Roots – Soil and Water Conservation Laboratory Manual - New Prairie Press Open Book Publishing, accessed August 11, 2025
Contextual Support Journal

The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees | Request PDF - ResearchGate, accessed July 24, 2025

View Source
Preview of Soil Respiration Characteristics and Karst Carbon Sink Potential in Woodlands and Grasslands - MDPI, accessed July 24, 2025
Soil Respiration Characteristics and Karst Carbon Sink Potential in Woodlands and Grasslands - MDPI, accessed July 24, 2025
Contextual Support Journal

Soil Respiration Characteristics and Karst Carbon Sink Potential in Woodlands and Grasslands - MDPI, accessed July 24, 2025

View Source
Preview of Topic 14: Grazing Management - Woolwise - The Australian Wool Education Trust, accessed July 24, 2025
Topic 14: Grazing Management - Woolwise - The Australian Wool Education Trust, accessed July 24, 2025
Contextual Support Journal

Topic 14: Grazing Management - Woolwise - The Australian Wool Education Trust, accessed July 24, 2025

View Source
Preview of www.barrierreef.org, accessed on May 25, 2025,
www.barrierreef.org, accessed on May 25, 2025,
Contextual Support Journal

Potassium for high-performing pastures | Nutrient Advantage, accessed July 28, 2025,

View Source

Context

  • Region Australia
  • Biome Arid Karstic Woodlands & Shrublands
  • Land Use Livestock Grazing & Pasture
  • Assessment Pristine Reference
  • Evidence Type ReferenceCondition

Lifecycle

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

Notes

Best-practice regenerative grazing aims to achieve this functional outcome by minimising physical stress and enhancing soil biology. There is no evidence of an upper detrimental threshold; lower penetrometer resistance consistently correlates with better soil health and function. ConsistencyResolver applied 2026-03-23 00:20 UTC: BenchmarkValue 500 → 2500 (check: MinAboveMax, rationale: Swapping values to correct the MinAboveMax contradiction. The MaximumOnly benchmark currently has 500 kPa but should have 2500 kPa as the upper threshold for severe degradation.)

Related Benchmarks

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

500 kPa Moderate
Livestock Grazing & Pasture · Pristine Reference
MinimumOnly Active v1