Soil Structure & Compaction

AUS-TSR-AGR-SSC General Moderate confidence

Benchmark Value

750 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 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MaximumOnly Guard

Evidence & Context

Therefore, a reference value of < 750 kPa is proposed as the benchmark for the best available condition.

Metric Definition:

Soil penetration resistance measured as the force required to penetrate the soil, indicating soil compaction and its impact on root growth.

Benchmark Definition:

This benchmark represents the best available soil structure condition in tropical agricultural soils where soil compaction minimally impedes root growth and ecosystem function.

Justification:

This benchmark is derived from research on sugarcane in tropical systems, identifying penetration resistance below which root growth is not restricted, representing the best available condition achievable in regenerative agricultural systems.

Sources (1)

High soil penetration resistance reduces sugarcane root system development Journal

High soil penetration resistance reduces sugarcane root system development

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Supporting Sources (6)

Additional references from the underlying research that informed this benchmark.

Criteria and Indicators for Sustainable Forest Management in Victoria, accessed July 19, 2025

Contextual Support Journal

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

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Soil compaction and controlled traffic considerations in Australian cotton-farming systems

Contextual Support Journal

Soil compaction and controlled traffic considerations in Australian cotton-farming systems, accessed July 17, 2025

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Soil compaction and controlled traffic considerations in Australian cotton-farming systems - BioOne Complete, accessed July 7, 2025,

Contextual Support Journal

Compendium of Smart Sugar Practices - Queensland Government

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Soil compaction effects on soil health and cropproductivity: an overview - ResearchGate, accessed July 17, 2025

Contextual Support Journal

Soil compaction effects on soil health and cropproductivity: an overview - ResearchGate, accessed July 17, 2025

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Soil-Specific Nutrient Management Guidelines for Sugarcane Production in the Wet Tropics, accessed July 17, 2025

Contextual Support Journal

Ranking buffel: Comparative risk and mitigation costs of key ...

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TROPICAL SOILS | Terrain NRM, accessed July 16, 2025,

Contextual Support Journal

A Revegetation Guide for Sub-Tropical Forest - Greening Australia, accessed July 20, 2025,

View Source

Context

Region Australia
Biome Tropical & Subtropical Rainforests
Land Use Agricultural Crop Production
Assessment Conservation Target
Evidence Type TargetCondition

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

No upper detrimental threshold — lower values are always better up to natural saturation. The benchmark of < 750 kPa represents a state of high ecological function where soil physical structure is not a limiting factor to ecosystem processes. It is based on studies relevant to sugarcane and regenerative management practices such as Controlled Traffic Farming (CTF), minimal tillage, and cover cropping.

Related Benchmarks

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