Soil Structure & Compaction

AUS-ASC-FOR-SSC General Moderate confidence

Benchmark Value

2500 kPa

Direction: Lower is desirable ↓

Form: MinimumOnly

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

Upper detrimental threshold: Values >2500 kPa severely impede root growth and overall ecological functions, with values >3000−3500 kPa indicating conditions where root growth virtually ceases.

Metric Definition:

Penetrometer resistance threshold above which severe ecological harm occurs, severely impeding root growth.

Benchmark Definition:

This benchmark indicates the soil penetrometer resistance threshold above which severe soil compaction occurs, causing major ecological harm and severely restricting root growth in alpine and subalpine production forestry soils.

Justification:

Supported by multiple studies showing severe root growth restriction above 2500 kPa.

Sources (1)

Preview of theaustralianalpsnationalparks.org, accessed on May 29, 2025,

theaustralianalpsnationalparks.org, accessed on May 29, 2025, Journal

Soil Conservation in Alpine Catchments - The Kosciuszko Huts Association, accessed August 17, 2025,

Supporting Sources (19)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Management of compaction during harvest of Pinus plantations in Queensland: I. Policy considerations for controlling machine activity. 1 - ResearchGate

(PDF) Management of compaction during harvest of Pinus plantations in Queensland: I. Policy considerations for controlling machine activity. 1 - ResearchGate

Contextual Support Journal

Soil Conservation Guidebook - Gov.bc.ca

Preview of (PDF) Review of factors affecting disturbance, compaction and ...

(PDF) Review of factors affecting disturbance, compaction and ...

Contextual Support Government

Compaction | VRO | Agriculture Victoria - Victorian Resources Online

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

Preview of Australia's Framework of Criteria and Indicators - DAFF, accessed July 12, 2025,

Australia's Framework of Criteria and Indicators - DAFF, accessed July 12, 2025,

Contextual Support Journal

Australia's Framework of Criteria and Indicators - DAFF, accessed July 30, 2025,

Preview of Australia's State of the Forests Report Synthesis 2023, accessed May 15, 2025,

Australia's State of the Forests Report Synthesis 2023, accessed May 15, 2025,

Contextual Support Journal

Australia's Framework of Criteria and Indicators - DAFF

Preview of Australian Alps - DCCEEW, accessed August 3, 2025,

Australian Alps - DCCEEW, accessed August 3, 2025,

Contextual Support Government

Alpine sphagnum bogs and associated fens - EPBC Act policy statement 3.16

Preview of Compaction of sandy soils in Radiata pine forests. I. A penetrometer study

Compaction of sandy soils in Radiata pine forests. I. A penetrometer study

Contextual Support Journal

Compaction of sandy soils in Radiata pine forests. I. A penetrometer study

Preview of Distribution, nature and threats to soils of the Australian Alps: A review - ResearchGate, accessed August 28, 2025,

Distribution, nature and threats to soils of the Australian Alps: A review - ResearchGate, accessed August 28, 2025,

Contextual Support GreyLiterature

REPORT ON THE INVESTIGATION INTO THE FUTURE OF CATTLE GRAZING IN THE ALPINE NATIONAL PARK

Preview of Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis - Frontiers, accessed July 30, 2025,

Impacts of Logging-Associated Compaction on Forest Soils: A Meta-Analysis - Frontiers, accessed July 30, 2025,

Contextual Support Journal

Distribution, nature and threats to soils of the Australian Alps: A ...

Preview of Land - CSIRO

Land - CSIRO

Contextual Support Government

Land - CSIRO

Preview of New South Wales Regional Forest Agreements - DAFF

New South Wales Regional Forest Agreements - DAFF

Regulatory Framework Government

New South Wales Regional Forest Agreements - DAFF

Preview of research-repository.griffith.edu.au, accessed on May 25, 2025,

research-repository.griffith.edu.au, accessed on May 25, 2025,

Contextual Support Journal

Impacts of Camping and Trampling on Australian Alpine and Subalpine Vegetation and Soils - Griffith Research Online

Preview of Short-term effects in canopy gap area on the recovery of compacted soil caused by forest harvesting in old-growth Oriental beech (Fagus orientalis Lipsky) stands - iForest - Biogeosciences and Forestry

Short-term effects in canopy gap area on the recovery of compacted soil caused by forest harvesting in old-growth Oriental beech (Fagus orientalis Lipsky) stands - iForest - Biogeosciences and Forestry

Direct Evidence

RELATIONSHIPS BETWEEN CONE PENETRATION RESISTANCE, BULK DENSITY, AND MOISTURE CONTENT IN UNCULTIVATED, REPACKED, AND CULTIVATED

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

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

Methodology Source Journal

Use of Impact Penetrometer to Determine Changes in Soil Compactness After Entracon Sioux EH30 Timber Harvesting - Crojfe

Preview of Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest - MDPI, accessed August 9, 2025,

Soil Compaction and Productivity Evolution in a Harvested and Grazed Mediterranean Scots Pine (Pinus sylvestris L.) Forest - MDPI, accessed August 9, 2025,

Direct Evidence Journal

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

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

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

Contextual Support Journal

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

Preview of Soil Conservation Guidebook - Gov.bc.ca

Soil Conservation Guidebook - Gov.bc.ca

Contextual Support Journal

New South Wales Regional Forest Agreements - DAFF

Preview of Synthesis based on Solgi et al. (2021) for undisturbed analogue, critical thresholds from GRDC (2022), Sands et al. (1979), and principles of best-practice forestry in sensitive alpine environments.

Synthesis based on Solgi et al. (2021) for undisturbed analogue, critical thresholds from GRDC (2022), Sands et al. (1979), and principles of best-practice forestry in sensitive alpine environments.

Contextual Support Journal

Short-term effects in canopy gap area on the recovery of compacted soil caused by forest harvesting in old-growth Oriental beech (Fagus orientalis Lipsky) stands - iForest - Biogeosciences and Forestry

Preview of theaustralianalpsnationalparks.org, accessed on May 25, 2025,

theaustralianalpsnationalparks.org, accessed on May 25, 2025,

Contextual Support Journal

Phosphorus Nutrition of Proteaceae in Severely Phosphorus-Impoverished Soils: Are There Lessons To Be Learned for Future Crops? - PubMed Central

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Production Forestry
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Rejected
Version 2
Effective From 3 Jun 2026
Effective To 3 Jun 2026

Notes

Values above this threshold indicate severe soil degradation and ecological impairment. AssessmentContext defaulted to 'Not Stated' because the source document did not state one. Pipeline correction 2026-06-03c: Rejected — erroneous BenchmarkForm (MinimumOnly+LowerGuard on SSC HigherIsDesirable=0; harm fires when resistance EXCEEDS 2500 kPa, not drops below). Correct form MaximumOnly+UpperGuard. MaximumOnly slot occupied by ID 1429 (1000 kPa). Requires StratificationKey (e.g., 'severe-root-growth-restriction-2500kPa') to coexist. Requeue document with prompt v3.7.

Related Benchmarks

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