Soil Structure & Compaction

AUS-TGP-LVG-SSC General High confidence

Benchmark Value

No specific value — see range

Direction: Lower is desirable ↓

Form: LowerThreshold

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

Based on the available evidence, this threshold is identified as a penetration resistance of 1500 kPa (1.5 MPa).

Metric Definition:

Penetrometer resistance at field capacity indicating the onset of significant ecological impairment due to soil compaction.

Benchmark Definition:

The lower critical threshold is the soil strength level at which key ecological functions become significantly compromised.

Justification:

1500 kPa is the point at which root growth for most plants begins to be restricted, marking a critical functional tipping point.

Sources (1)

high soil strength - fact sheet - Grains Research and Development Corporation (GRDC) Journal

high soil strength - fact sheet - Grains Research and Development Corporation (GRDC)

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Supporting Sources (20)

Additional references from the underlying research that informed this benchmark.

Ch 6. Soil Degradation: Erosion, Compaction, and Contamination - SARE, accessed August 2, 2025,

Contextual Support GreyLiterature

Ch 6. Soil Degradation: Erosion, Compaction, and Contamination - SARE

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Chapter 9 AUSTRALIAN GRASSLANDS - Food and Agriculture Organization of the United Nations

Contextual Support Journal

Productive native pastures in the high and medium rainfall zones - Australian Wool Innovation

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Chapter 9 AUSTRALIAN GRASSLANDS - Food and Agriculture Organization of the United Nations, accessed August 5, 2025,

Contextual Support Government

Karst and agriculture in Australia - Digital Commons @ USF, accessed July 26, 2025,

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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

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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,

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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

Grazing effects on soil physical properties and the consequences for pastures: a review

Methodology Source GreyLiterature

The dynamic penetrometer for assessment of soil mechanical resistance - ResearchGate

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How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers

Contextual Support GreyLiterature

How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers

View Source

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

Contextual Support Journal

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

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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

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Managing Grazing to Restore Soil Health, Ecosystem Function, and Ecosystem Services - Frontiers, accessed July 30, 2025,

Contextual Support Journal

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed July 10, 2025,

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Managing soils to keep them healthy and productive - MLA, accessed July 28, 2025,

Contextual Support Journal

Soil Compaction Affects the Growth and Establishment of Street Trees in Urban Australia

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Mechanical Resistance to Penetration for Improved Diagnosis of ..., accessed July 30, 2025,

Methodology Source Journal

Mechanical Resistance to Penetration for Improved Diagnosis of Soil Compaction at Grazing and Forest Sites - MDPI

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Pasture yield and soil physical property responses to soil compaction from treading and grazing — a review - CSIRO Publishing

Contextual Support Journal

Pasture yield and soil physical property responses to soil compaction from treading and grazing — a review - CSIRO Publishing

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Regenerative Grazing: 3 Different Approaches - Shorthandstories.com, accessed August 5, 2025,

Contextual Support GreyLiterature

Regenerative Grazing: 3 Different Approaches - Shorthandstories.com

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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

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Soil management for dairy and beef cattle grazing

Contextual Support

Pasture responses to ameliorating sandy soil constraints at Western Flat - Coorong District Council

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Temperate Grasslands - Greening Australia, accessed August 4, 2025

Contextual Support Journal

Managing natural areas | City of Gold Coast, accessed May 19, 2025

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Understanding soil tests for pastures | Soil | Farm management ..., accessed May 12, 2025

Contextual Support Government

Understanding soil tests for pastures

View Source

Woodlands - DCCEEW, accessed August 5, 2025,

Contextual Support

Woodlands - DCCEEW, accessed May 19, 2025

View Source

Context

Region Australia
Biome Temperate Grassy Woodlands & Plains
Land Use Livestock Grazing & Pasture
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 21 Mar 2026

Notes

Above this threshold, pasture productivity and resilience are compromised due to restricted root access to subsoil water and nutrients. ConsistencyResolver applied 2026-03-23 00:16 UTC: LowerThreshold 1500 → (check: MinEqualsMax, rationale: The Notes indicate that 1500 kPa is an upper degradation limit, so the LowerThreshold on the MinimumOnly benchmark is incorrect and should be cleared to avoid zero-width range and duplicate MaximumOnly forms.) ConsistencyResolver applied 2026-03-24 20:10 UTC: BenchmarkValue 1500 → (check: MinEqualsMax, rationale: The Notes indicate that 1500 kPa is an upper degradation limit, so the MinimumOnly benchmark's BenchmarkValue of 1500 is incorrect and should be cleared to avoid zero-width range and duplicate MaximumOnly forms.)

Related Benchmarks

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