Soil Structure & Compaction

AUS-TMS-FOR-SSC General Moderate confidence

Benchmark Value

No specific value — see range

Thresholds: Lower: —, Upper: 2000

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

Contributing Benchmarks

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

Evidence & Context

A critical lower boundary is established at a penetrometer resistance of >2000 kPa, a widely recognized threshold at which root growth is severely impeded, compromising tree health and site productivity.

Metric Definition:

Penetrometer resistance threshold above which root growth is severely impeded.

Benchmark Definition:

This benchmark represents the critical penetrometer resistance threshold above which root growth is significantly impaired, leading to compromised tree health and site productivity in tropical monsoonal savanna production forestry.

Justification:

This threshold is corroborated by multiple sources and represents a conservative ecological benchmark for root growth impairment.

Sources (1)

(PDF) Soil Compaction and Root Growth: A Review - ResearchGate, accessed July 30, 2025,

(PDF) Soil Compaction and Root Growth: A Review - ResearchGate

View Source

Supporting Sources (20)

Additional references from the underlying research that informed this benchmark.

(PDF) Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load - ResearchGate, accessed May 16, 2025,

Contextual Support Direct Evidence Journal

(PDF) Soil compaction and eucalyptus growth in response to forwarder traffic intensity and load - ResearchGate, accessed May 16, 2025,

View Source

Assessment of Code of Practice for Plantation Forestry: Northern Territory - DAFF, accessed May 16, 2025,

Contextual Support

Assessment of Code of Practice for Plantation Forestry: Northern Territory - DAFF, accessed May 16, 2025,

View Source

bg.copernicus.org, accessed May 16, 2025,

Contextual Support Journal

bg.copernicus.org, accessed May 16, 2025,

View Source

Changes in cone penetrometer resistance (KPa) through the profile in... - ResearchGate, accessed May 16, 2025,

Contextual Support GreyLiterature

Changes in cone penetrometer resistance (KPa) through the profile in... - ResearchGate, accessed May 16, 2025,

View Source

Effects of Recreational Camping on the Environmental Values of National Parks in Sri Lanka, accessed May 16, 2025,

Contextual Support Journal

Effects of Recreational Camping on the Environmental Values of National Parks in Sri Lanka, accessed May 16, 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,

Direct Evidence Journal

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 20, 2025

View Source

Preview of Estimation of the impact of precrops and climate variability on soil depth- differentiated spring wheat growth and water, nitrogen and phosphorus uptake | Request PDF - ResearchGate, accessed May 16, 2025,

Estimation of the impact of precrops and climate variability on soil depth- differentiated spring wheat growth and water, nitrogen and phosphorus uptake | Request PDF - ResearchGate, accessed May 16, 2025,

Contextual Support Journal

View Source

fwpa.com.au, accessed May 16, 2025,

Contextual Support Journal

fwpa.com.au, accessed May 16, 2025,

View Source

Grazing management systems and their effects on savanna ecosystem dynamics - CiteSeerX, accessed May 16, 2025,

Contextual Support

Grazing management systems and their effects on savanna ecosystem dynamics - CiteSeerX, accessed May 16, 2025,

View Source

Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis

Contextual Support GreyLiterature

Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis

View Source

Preview of 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,

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,

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

Management impacts on health of soils supporting Australian grain ..., accessed July 28, 2025

Contextual Support Journal

Management impacts on health of soils supporting Australian grain and sugarcane industries | Request PDF - ResearchGate, accessed May 16, 2025,

View Source

National Soil Monitoring Program - CSIRO, accessed August 4, 2025,

Contextual Support GreyLiterature

National Soil Monitoring Program - CSIRO

View Source

Pinelands: Impacts of Different Long-Term Land Uses on Soil Physical Properties in Red Ferrosols - MDPI, accessed July 19, 2025

Contextual Support Journal

Land management technical notes and fact sheets

View Source

Sitemap - Forest & Wood Products Australia, accessed May 16, 2025,

Contextual Support GreyLiterature

Sitemap - Forest & Wood Products Australia, accessed May 17, 2025,

View Source

Soil penetration resistance and tree root development | Request PDF - ResearchGate, accessed May 16, 2025,

Contextual Support Direct Evidence Journal

Soil penetration resistance and tree root development | Request PDF - ResearchGate, accessed May 16, 2025,

View Source

SOIL PHYSICOCHEMICAL PROPERTIES IN DIFFERENT STAND ...

Direct Evidence Journal

SOIL PHYSICOCHEMICAL PROPERTIES IN DIFFERENT STAND ...

View Source

The water quality and economic benefits of agricultural management practices, accessed August 5, 2025

Contextual Support Journal

Protecting farm waterways | Dairy News Australia

View Source

www.forestworks.com.au, accessed May 16, 2025,

Contextual Support Journal

www.forestworks.com.au, accessed May 16, 2025,

View Source

www.frontiersin.org, accessed May 16, 2025,

Contextual Support Journal

www.frontiersin.org

View Source

Context

Region Australia
Biome Tropical Monsoonal Savannas
Land Use Production Forestry
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 21 Mar 2026

Notes

Root growth and distribution are significantly reduced when soil strength reaches critical levels. The general consensus is that a penetrometer resistance of 2000 to 3000 kPa represents a major impediment to roots of most plants, including trees. ConsistencyResolver applied 2026-03-23 00:15 UTC: BenchmarkValue 2000 → (check: MinAbovePointValue, rationale: Clear BenchmarkValue to avoid duplication since the threshold is now in UpperThreshold.) ConsistencyResolver applied 2026-03-23 00:15 UTC: UpperThreshold → 2000 (check: MinAbovePointValue, rationale: The Notes state that penetrometer resistance >2000 kPa causes root growth impairment, indicating this is an upper degradation threshold. Moving the value to UpperThreshold will auto-correct the form to MaximumOnly, resolving the contradiction.) [Auto-corrected BenchmarkForm: MinimumOnly → MaximumOnly] ConsistencyResolver applied 2026-03-23 00:15 UTC: LowerThreshold → (check: MinAbovePointValue, rationale: Clear the LowerThreshold field to avoid confusion; it is currently null.)

Related Benchmarks

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