Soil Structure & Compaction

AUS-ASC-AGR-SSC General Moderate confidence

Benchmark Value

2000 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 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 this evidence, a lower critical threshold (i.e., an upper limit for acceptable penetrometer resistance) of >2000 kPa is proposed for agricultural crop production in the alpine and subalpine context.

Metric Definition:

Soil penetrometer resistance measured as the force required to push a standardized cone through the soil profile, expressed in kilopascals (kPa).

Benchmark Definition:

This benchmark defines the maximum penetrometer resistance threshold beyond which soil functions and crop productivity are significantly impaired in agricultural crop production within the Australian alpine and subalpine biome.

Justification:

Based on consistent findings across agricultural studies indicating significant root impediment and functional decline at penetrometer resistances exceeding 2000-2500 kPa.

Sources (3)

(PDF) Soil compaction and controlled traffic considerations in ..., accessed July 30, 2025,

Ripping Mallee soils, what are the production benefits? - Agronomy Australia Proceedings

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Diagnosing Soil Compaction Using a Penetrometer - Sherman

Diagnosing Soil Compaction Using a Penetrometer - Sherman

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Preview of Protect your soil from compaction - NSW Department of Primary Industries, accessed July 7, 2025,

Protect your soil from compaction - NSW Department of Primary Industries, accessed July 7, 2025, Government

Soil Compaction in Annual Crop Production: Causes, Impacts, and Solutions - WSU Research Exchange

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Supporting Sources (3)

Additional references from the underlying research that informed this benchmark.

Identify Soil Compaction to Boost Crop Yields - Innoquest Inc

Contextual Support Journal

Identify Soil Compaction to Boost Crop Yields - Innoquest Inc

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Identifying soil compaction - Department of Agriculture and Food

Direct Evidence

Critical Limits for Soybean and Black Bean Root Growth, Based on ...

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Understanding Soil Compaction: How It Affects Crop Yield in Agriculture

Contextual Support GreyLiterature

Understanding Soil Compaction: How It Affects Crop Yield in Agriculture

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Context

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

Lifecycle

Status Active
Version 2
Effective From 3 Jun 2026

Notes

Values consistently exceeding 2000-2500 kPa are considered detrimental to soil health and crop productivity in alpine and subalpine agricultural systems. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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