Soil Structure & Compaction

AUS-TSW-LVG-SSC General Moderate confidence

Benchmark Value

No specific value — see range

Range: 0 to 500 kPa

Optimal Range: 0 to 500

Direction: Lower is desirable ↓

Form: OptimalRange

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 8 benchmarks together — the OptimalRange form drives the primary score, while 7 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary OptimalRange Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard OptimalRange Guard MinimumOnly Guard

Evidence & Context

The GRDC diagnostic framework, developed for Australian conditions, defines a penetration resistance of < 500 kPa as 'Not compacted' or 'Loose'.

Metric Definition:

Soil penetration resistance range indicating non-compacted, loose soil ideal for root growth.

Benchmark Definition:

This benchmark defines the optimal soil penetration resistance range for healthy soil structure and root growth in temperate semi-arid shrublands and open woodlands under livestock grazing.

Justification:

This range is established by the GRDC diagnostic framework as representing ideal soil physical conditions.

Supporting Sources (4)

Additional references from the underlying research that informed this benchmark.

Impact of agricultural land use on distribution of microbial biomass and activity within soil aggregates - ResearchGate

Contextual Support Journal

Plant responses to livestock grazing frequency in an Australian temperate grassland, accessed August 8, 2025,

View Source

Managing sandy soils across low-rainfall regions of south-eastern Australia (GRDC Fact Sheet)

Direct Evidence Journal

Managing sandy soils across low-rainfall regions of south-eastern Australia (GRDC Fact Sheet)

View Source

Soil Compaction Explained - Soil Quality Knowledge Base, accessed August 2, 2025,

Contextual Support

high soil strength - fact sheet - GRDC

View Source

This may be the author's version of a work that was submitted/accepted for publication in the following source: Michael, RN., - QUT ePrints

Direct Evidence Journal

This may be the author's version of a work that was submitted/accepted for publication in the following source: Michael, RN., - QUT ePrints

View Source

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

Values below 500 kPa represent an ideal state with no physical limitations on root growth. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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