Soil Structure & Compaction

AUS-TSR-FOR-SSC General Moderate confidence

Benchmark Value

1500 kPa
Direction: Lower 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 4 benchmarks together — the OptimalRange form drives the primary score, while 3 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MaximumOnly Guard MaximumOnly Guard MinimumOnly Guard

Evidence & Context

The reference value of <1500 kPa is derived from studies on Australian native trees (Costello, 2001), which identify ~1500 kPa as the threshold where root penetration is significantly restricted (60% reduction) and 3500-4000 kPa as the point where root growth ceases.

Metric Definition:

Soil penetrometer resistance (kPa) as a measure of soil compaction affecting root growth and soil structure.

Benchmark Definition:

This benchmark indicates the maximum soil compaction level measured by penetrometer resistance beyond which root growth is significantly restricted in tropical rainforest production forestry.

Justification:

This benchmark is a synthesis of multiple lines of evidence including the best-practice North Queensland selective logging system's goal to minimize soil compaction, proxy bulk density data from undisturbed rainforest soils, and experimental root growth studies indicating critical kPa thresholds.

Sources (1)

Preview of The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees | Arboriculture & Urban Forestry
The Influence of Compaction and Soil Strength on the Establishment of Four Australian Landscape Trees | Arboriculture & Urban Forestry Journal

Resistance and resilience of the forest soil microbiome to logging ...

View Source

Supporting Sources (21)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Reduced-impact logging: Challenges and opportunities - ResearchGate, accessed July 31, 2025
(PDF) Reduced-impact logging: Challenges and opportunities - ResearchGate, accessed July 31, 2025
Contextual Support Journal

Reduced-impact logging: Challenges and opportunities - ResearchGate

View Source
Preview of (PDF) Sustainable harvesting of tropical rainforests: Reply to Keto ..., accessed July 20, 2025,
(PDF) Sustainable harvesting of tropical rainforests: Reply to Keto ..., accessed July 20, 2025,
Contextual Support Journal

(PDF) Reduced-impact logging: Challenges and opportunities, accessed July 20, 2025

View Source
Preview of (PDF) Sustainable harvesting of tropical rainforests: Reply to Keto, Scott and Olsen, accessed July 20, 2025
(PDF) Sustainable harvesting of tropical rainforests: Reply to Keto, Scott and Olsen, accessed July 20, 2025
Contextual Support GreyLiterature

Soundscapes predict species occurrence in tropical forests - ResearchGate, accessed July 20, 2025

View Source
Preview of AUSTRALIA'S STATE OF THE FORESTS REPORT - DAFF, accessed July 12, 2025,
AUSTRALIA'S STATE OF THE FORESTS REPORT - DAFF, accessed July 12, 2025,
Contextual Support Journal

Final report Advice on finalising Draft Private Native Forestry Codes of Practice March 2022

View Source
Preview of Criteria and Indicators for Sustainable Forest Management in Victoria, accessed July 19, 2025
Criteria and Indicators for Sustainable Forest Management in Victoria, accessed July 19, 2025
Contextual Support Journal

Soil health: the foundation of sustainable agriculture - 2001 ...

View Source
Preview of Effects of Selection Logging on Rainforest Productivity - ResearchGate, accessed July 20, 2025
Effects of Selection Logging on Rainforest Productivity - ResearchGate, accessed July 20, 2025
Contextual Support GreyLiterature

Effects of Selection Logging on Rainforest Productivity - ResearchGate

View Source
Preview of Effects of Selection Logging on Rainforest Productivity - UQ eSpace, accessed July 20, 2025,
Effects of Selection Logging on Rainforest Productivity - UQ eSpace, accessed July 20, 2025,
Contextual Support Journal

A review of forest practice codes in Australia, accessed July 20, 2025,

View Source
Preview of Effects of soil compaction on the growth and mortality of planted dipterocarp seedlings in a logged-over tropical rainforest in Sarawak, Malaysia | Request PDF - ResearchGate, accessed July 30, 2025,
Effects of soil compaction on the growth and mortality of planted dipterocarp seedlings in a logged-over tropical rainforest in Sarawak, Malaysia | Request PDF - ResearchGate, accessed July 30, 2025,
Contextual Support Journal

International Workshop on Soils - This document is discoverable and free to researchers across the globe due to the work of AgEcon Search. Help ensure our sustain, accessed May 16, 2025,

View Source
Preview of Keith, H., et al. (2009). The impact of harvesting native forests on vegetation and soil C stocks and soil CO2, N2O and CH4 fluxes. Australian Forestry, 72(4), 183-194.
Keith, H., et al. (2009). The impact of harvesting native forests on vegetation and soil C stocks and soil CO2, N2O and CH4 fluxes. Australian Forestry, 72(4), 183-194.
Contextual Support GreyLiterature

The impact of harvesting native forests on vegetation and soil C stocks, and soil CO2, N2O and CH4 fluxes - ResearchGate, accessed May 15, 2025

View Source
Preview of LANDSLIDES Processes, Prediction, and Land Use - National Academic Digital Library of Ethiopia, accessed July 20, 2025
LANDSLIDES Processes, Prediction, and Land Use - National Academic Digital Library of Ethiopia, accessed July 20, 2025
Contextual Support Journal

LANDSLIDES Processes, Prediction, and Land Use - National Academic Digital Library of Ethiopia, accessed July 20, 2025,

View Source
Preview of Logging Operations and Soil Compaction - Land-Grant Press - Clemson University, accessed July 20, 2025
Logging Operations and Soil Compaction - Land-Grant Press - Clemson University, accessed July 20, 2025
Contextual Support GreyLiterature

Soil Compaction—Effects on Urban Vegetation, accessed August 2, 2025

View Source
Preview of Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 20, 2025
Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 20, 2025
Contextual Support GreyLiterature

Forest soils need many decades to recover from fires and logging - ANU College of Science and Medicine - The Australian National University, accessed July 20, 2025

View Source
Preview of Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 30, 2025,
Resistance and resilience of the forest soil microbiome to logging-associated compaction, accessed July 30, 2025,
Contextual Support Journal

Use Our: Soil Penetrometer - onondaga county soil & water conservation district, accessed August 2, 2025

View Source
Preview of SIDLE&OCHIAI - 2006 - Landslides - Processes, Prediction, and Land Use | PDF - Scribd, accessed July 20, 2025
SIDLE&OCHIAI - 2006 - Landslides - Processes, Prediction, and Land Use | PDF - Scribd, accessed July 20, 2025
Contextual Support GreyLiterature

SIDLE&OCHIAI - 2006 - Landslides - Processes, Prediction, and Land Use | PDF - Scribd, accessed July 20, 2025

View Source
Preview of Soil compaction and deformation in forest exploitation - Stichting Probos, accessed July 20, 2025
Soil compaction and deformation in forest exploitation - Stichting Probos, accessed July 20, 2025
Contextual Support Journal

Soil compaction and deformation in forest exploitation - Stichting Probos, accessed August 2, 2025

View Source
Preview of Soil compaction and the architectural plasticity of root systems - Oxford Academic, accessed July 20, 2025
Soil compaction and the architectural plasticity of root systems - Oxford Academic, accessed July 20, 2025
Contextual Support Journal

Soil compaction and the architectural plasticity of root systems - Oxford Academic, accessed July 20, 2025

View Source
Preview of Soil physical and hydrological properties following logging and ..., accessed July 20, 2025
Soil physical and hydrological properties following logging and ..., accessed July 20, 2025
Contextual Support GreyLiterature

Plant litter decomposition and nutrient cycling in north Queensland tropical rain-forest communities of differing successional status - ResearchGate, accessed July 20, 2025

View Source
Preview of Sustainable Harvesting of Tropical Rainforests: Reply to Keto, Scott and Olsen JK Vanclay, EJ Rudder, G - UQ eSpace, accessed July 20, 2025,
Sustainable Harvesting of Tropical Rainforests: Reply to Keto, Scott and Olsen JK Vanclay, EJ Rudder, G - UQ eSpace, accessed July 20, 2025,
Contextual Support Journal

Sustainable timber harvesting in the rainforests of ... - UQ eSpace, accessed July 20, 2025

View Source
Preview of The Effects of Soil Compaction on the Growth and Architecture of the Seedlings of Species Commonly Used for Afforestation in Iran - MDPI, accessed July 20, 2025
The Effects of Soil Compaction on the Growth and Architecture of the Seedlings of Species Commonly Used for Afforestation in Iran - MDPI, accessed July 20, 2025
Contextual Support Journal

The Effects of Soil Compaction on the Growth and Architecture of the Seedlings of Species Commonly Used for Afforestation in Iran - MDPI, accessed July 20, 2025

View Source
Preview of The Influence of Compaction and Soil Strength on the Establishment ..., accessed July 20, 2025
The Influence of Compaction and Soil Strength on the Establishment ..., accessed July 20, 2025
Contextual Support Journal

Ecosystem dynamics of disturbed and undisturbed sites in north Queensland wet tropical rain forest. I. Floristic composition, climate and soil chemistry - Cambridge University Press, accessed July 20, 2025,

View Source
Preview of Vanclay, J.K., 1995. Sustainable silvicultural systems: lessons from Queensland, Australia. In - CiteSeerX, accessed July 20, 2025
Vanclay, J.K., 1995. Sustainable silvicultural systems: lessons from Queensland, Australia. In - CiteSeerX, accessed July 20, 2025
Contextual Support

Vanclay, J.K., 1995. Sustainable silvicultural systems: lessons from Queensland, Australia. In - CiteSeerX, accessed July 20, 2025

View Source

Context

  • Region Australia
  • Biome Tropical & Subtropical Rainforests
  • Land Use Production Forestry
  • Assessment Conservation Target
  • Vegetation Forest
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 5 Jun 2026

Notes

No direct penetrometer resistance value exists for a best-practice site; the benchmark is derived from proxy and experimental data. The upper detrimental threshold is >1500 kPa with critical failure at >3500 kPa. A lower critical threshold is qualitatively described but not quantified in kPa.

Related Benchmarks

Other benchmarks in the AUS-TSR-FOR-SSC family.

— g/cm³ Moderate
Production Forestry · Conservation Target · Forest
OptimalRange Active v1
3500 kPa Moderate
Production Forestry · Conservation Target · Forest
MaximumOnly Active v1