Soil Structure & Compaction

AUS-TSW-FOR-SSC General Moderate confidence

Benchmark Value

1694 kPa

Direction: Lower is desirable ↓

Form: Point

Scoring Curve

Scoring curve unavailable

The scoring engine could not generate a curve for this benchmark context. The primary form is CompositeFramework, but the benchmark data may be missing required fields (e.g., optimal range bounds for an OptimalRange benchmark). This is typically a data quality issue in the benchmark pipeline.

Contributing Benchmarks

CompositeFramework Primary MaximumOnly Guard UpperThreshold Guard MaximumOnly Guard UpperThreshold Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard Point Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard

Evidence & Context

Therefore, the proposed reference value is 1,694 kPa.

Metric Definition:

Penetration resistance as a direct measure of the mechanical impedance roots face as they attempt to grow through the soil.

Benchmark Definition:

This benchmark represents the best-on-offer soil penetration resistance under sustainable production forestry in temperate semi-arid shrublands and open woodlands, indicating the mechanical impedance roots face in well-managed soils.

Justification:

The value is derived from a high-quality proxy study in a climatically analogous Mediterranean forest, representing the best available evidence in the absence of direct Australian data.

Sources (1)

Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest Journal

Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest

View Source

Supporting Sources (6)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Review of factors affecting disturbance, compaction and trafficability of soils with particular reference to timber harvesting in the forests of south-west Western Australia - ResearchGate, accessed July 30, 2025,

(PDF) Review of factors affecting disturbance, compaction and trafficability of soils with particular reference to timber harvesting in the forests of south-west Western Australia - ResearchGate, accessed July 30, 2025,

Contextual Support

Australia's State of the Forests Report Synthesis 2023

View Source

Healthy Roots and Healthy Trees - 2.926 - CSU Extension - Colorado State University

Irrelevant

Healthy Roots and Healthy Trees - 2.926 - CSU Extension - Colorado State University

View Source

Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis - Frontiers, accessed July 11, 2025,

Contextual Support Journal

Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis - Frontiers, accessed July 19, 2025

View Source

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

Contextual Support GreyLiterature

National Soil Monitoring Program - CSIRO, accessed July 8, 2025

View Source

Preview of Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest - Universitat Politècnica de Madrid - Portal Científico UPM, accessed July 11, 2025,

Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest - Universitat Politècnica de Madrid - Portal Científico UPM, accessed July 11, 2025,

Contextual Support Journal

View Source

Tree Root Growth Requirements - Arborcare Tree and Garden ...

Contextual Support Journal

Tree Root Growth Requirements - Arborcare Tree and Garden ...

View Source

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Production Forestry
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

This benchmark represents the mean penetrometer resistance in the 10-20 cm subsoil of "low traffic" areas within a long-term production forest, reflecting the best available condition achievable under controlled-traffic sustainable forestry. No upper detrimental threshold — higher values are always worse as less compaction is better in this ecosystem. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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