Soil Moisture

AUS-AMR-AGR-SMO General Moderate confidence

Benchmark Value

7 % VWC

Direction: Higher 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 OptimalRange Guard OptimalRange Guard MinimumOnly Guard OptimalRange Guard MinimumOnly Guard

Evidence & Context

A comprehensive global study, utilizing data from a network of eddy covariance flux towers, provides a robust, empirically derived value for this functional threshold. The analysis revealed that for dry climate ecosystems worldwide, the median critical soil moisture threshold (θcrit) is 7.0 ± 1.1% volumetric water content.

Metric Definition:

Critical soil moisture threshold (θcrit) indicating the onset of significant ecosystem water stress in dryland cropping systems.

Benchmark Definition:

Lower critical soil moisture threshold marking the onset of water stress and functional impairment in the ecosystem.

Justification:

Derived from a global analysis of dry climate ecosystems using empirical data from eddy covariance flux towers.

Sources (1)

Critical soil moisture thresholds of plant water stress in terrestrial ecosystems Journal

Critical soil moisture thresholds of plant water stress in terrestrial ecosystems

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Supporting Sources (5)

Additional references from the underlying research that informed this benchmark.

Managing soils during and after drought in cropping systems - Fact sheet - Soil CRC, accessed July 27, 2025,

Contextual Support Journal

Managing soils during and after drought in cropping systems - Fact sheet - Soil CRC, accessed July 27, 2025,

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Soil and Landscape Grid of Australia - CSIRO, accessed July 30, 2025,

Contextual Support Government

Soil and Landscape Grid of Australia - CSIRO

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Soil quality indicators to assess functionality of restored soils in degraded semiarid ecosystems - Solvita, accessed July 27, 2025,

Contextual Support Journal

Soil quality indicators to assess functionality of restored soils in degraded semiarid ecosystems - Solvita, accessed July 27, 2025,

View Source

Preview of The impact, identification and management of dispersive soils in rainfed cropping systems - UQ eSpace - The University of Queensland, accessed July 6, 2025,

The impact, identification and management of dispersive soils in rainfed cropping systems - UQ eSpace - The University of Queensland, accessed July 6, 2025,

Direct Evidence Journal

Cover cropping impacts on soil water and carbon in dryland ...

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Waterlogging in Australian agricultural landscapes: a review of plant responses and crop models - ResearchGate, accessed July 7, 2025,

Contextual Support Journal

Waterlogging in Australian agricultural landscapes: a review of plant responses and crop models - ResearchGate

View Source

Context

Region Australia
Biome Arid Mountain Ranges & Uplands
Land Use Agricultural Crop Production
Assessment Conservation Target
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 10 Jun 2026

Notes

No upper detrimental threshold — higher values are always better up to natural saturation. This threshold is functionally more relevant than the Permanent Wilting Point and represents the point where ecosystem processes become water-limited.

Related Benchmarks

Other benchmarks in the AUS-AMR-AGR-SMO family.