Soil Structure & Compaction

AUS-TDG-AGR-SSC General Low confidence

Benchmark Value

No specific value — see range

Range: 0 to 1500 kPa

Optimal Range: 0 to 1500

Direction: Lower is desirable ↓

Form: OptimalRange

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 14 benchmarks together — the OptimalRange form drives the primary score, while 13 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Based on the thresholds for root limitation and the characteristics of healthy soils, an optimal penetrometer resistance range for fostering overall ecosystem health and ensuring sustainable crop production within Australian Temperate Dry Woodlands & Native Grasslands under regenerative management would be consistently < 1500 kPa, and ideally < 1000 kPa, throughout the main root zone when measured at field capacity.

Metric Definition:

Soil penetrometer resistance (PR) range indicating optimal soil physical condition for root growth and ecosystem health.

Benchmark Definition:

This benchmark defines the optimal soil penetrometer resistance range for healthy soil physical condition and sustainable crop production in the Temperate Dry Woodlands & Native Grasslands biome under regenerative management.

Justification:

This range promotes unimpeded root growth, efficient water use, and healthy soil biological activity.

Sources (1)

Soil Structural Quality and Relationships With Root Properties in Single and Integrated Farming Systems - Frontiers Journal

Soil Structural Quality and Relationships With Root Properties in Single and Integrated Farming Systems - Frontiers

View Source

Supporting Sources (9)

Additional references from the underlying research that informed this benchmark.

(PDF) Determining reference conditions for management and ...

Contextual Support GreyLiterature

(PDF) Determining reference conditions for management and ...

View Source

(PDF) Determining reference conditions for management and ..., accessed August 5, 2025,

Contextual Support Journal

Effects of Stock Grazing on Biodiversity Values in Temperate Native Grasslands and Grassy Woodlands in SE Australia: A Literature Review - ACT Government

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(PDF) Improving soil physical fertility and crop yield on a clay soil in ...

Direct Evidence GreyLiterature

Soil Health Assessment Part IV: Soil Penetration Resistance and ..., accessed August 2, 2025

View Source

Preview of Agronomic, Soil Quality and Environmental Consequences of Using Compost in Vegetable Production | Request PDF - ResearchGate, accessed May 10, 2025,

Agronomic, Soil Quality and Environmental Consequences of Using Compost in Vegetable Production | Request PDF - ResearchGate, accessed May 10, 2025,

Contextual Support Journal

Agronomic, Soil Quality and Environmental Consequences of Using Compost in Vegetable Production | Request PDF - ResearchGate

View Source

From soil health to agricultural productivity - University of Southern Queensland Repository, accessed May 10, 2025,

Contextual Support Journal

From soil health to agricultural productivity - University of Southern Queensland Repository

View Source

Preview of Influence of tree species and forest land use on soil hydraulic conductivity and implications for surface runoff generation | Request PDF - ResearchGate, accessed May 10, 2025,

Influence of tree species and forest land use on soil hydraulic conductivity and implications for surface runoff generation | Request PDF - ResearchGate, accessed May 10, 2025,

Contextual Support GreyLiterature

Influence of tree species and forest land use on soil hydraulic conductivity and implications for surface runoff generation | Request PDF - ResearchGate

View Source

Living soils in agriculture | TERN Australia, accessed July 25, 2025,

Contextual Support Government

Living soils in agriculture | TERN Australia, accessed July 16, 2025,

View Source

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

Contextual Support Journal

Deep roots and soil structure - PMC - PubMed Central

View Source

Soil compaction | Environment, land and water | Queensland Government, accessed August 4, 2025,

Contextual Support Government

Soil Management for Sustainable Agriculture - MDPI

View Source

Context

Region Australia
Biome Temperate Dry Woodlands & Native Grasslands
Land Use Agricultural Crop Production
Assessment Not Stated
Evidence Type HealthyOperationalRange

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

No upper detrimental threshold — higher values are always worse beyond this range. The optimal range ensures minimal mechanical impedance to root growth and supports robust ecosystem health. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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