Soil Structure & Compaction

AUS-AIF-LVG-SSC General Moderate confidence

Benchmark Value

3000 kPa

Thresholds: Lower: 1500, Upper: —

Direction: Lower is desirable ↓

Form: MinimumOnly

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 13 benchmarks together — the OptimalRange form drives the primary score, while 12 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Based on this evidence, the critical threshold for a degraded state in this specific biome and land use is defined as a penetration resistance consistently exceeding 3000 kPa in the primary root zone (0-30 cm) when the soil is moist (i.e., at or near field capacity).

Metric Definition:

Soil penetration resistance threshold above which soil structure is considered severely compromised and degraded.

Benchmark Definition:

Critical soil penetration resistance threshold indicating degraded soil structure.

Justification:

Reflects the point where grazing pressures overwhelm natural soil resilience and biological porosity.

Sources (1)

Preview of Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - ResearchGate, accessed July 19, 2025,

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - ResearchGate, accessed July 19, 2025, Journal

View Source

Context

Region Australia
Biome Arid Inland Floodplains & Ephemeral River Systems
Land Use Livestock Grazing & Pasture
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 21 Mar 2026

Notes

Indicates severe mechanical impedance and compromised soil function. ConsistencyResolver applied 2026-03-23 00:20 UTC: UpperThreshold → (check: MinAboveMax, rationale: Clear LowerThreshold set; UpperThreshold remains null.) ConsistencyResolver applied 2026-03-23 00:20 UTC: LowerThreshold → 1500 (check: MinAboveMax, rationale: The Notes indicate that 3000 kPa is an upper degradation limit, so the MinimumOnly benchmark should have a LowerThreshold of 1500 kPa (the old MaximumOnly value) to represent the lower floor. This will auto-correct the form to MinimumOnly with a proper lower threshold.)

Related Benchmarks

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