Soil Moisture

AUS-TDG-FOR-SMO General Moderate confidence

Benchmark Value

No specific value — see range
Range: 2 to 9 %
Thresholds: Lower: 2, Upper: —
Optimal Range: 2 to 9
Direction: Higher is desirable ↑
Form: OptimalRange

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 LowerThreshold Guard OptimalRange Guard CompositeFramework Guard Point Guard

Evidence & Context

The absolute lower critical threshold is defined by the Volumetric Water Content (VWC) at Permanent Wilting Point (PWP), which typically corresponds to a soil water potential of -1500 kPa. Below this, most plants cannot recover from wilting. Indicative VWC at PWP: ~2-5% for loamy sands; ~6-9% for sandy loams.

Metric Definition:

Volumetric Water Content (VWC) at Permanent Wilting Point (PWP), the soil water content at a soil water potential of approximately -1500 kPa where plants cannot recover from wilting.

Benchmark Definition:

This benchmark represents the critical lower limit of soil moisture, measured as Volumetric Water Content, below which most plants cannot recover from wilting in temperate dry woodlands and native grasslands under production forestry.

Justification:

PWP is classically defined as the soil water content at a soil water potential of approximately -1500 kPa. Below this point, most plants are unable to extract sufficient water to maintain turgor and will wilt, typically without recovery even if water is resupplied.

Sources (1)

Preview of A guide to managing Box Gum Grassy Woodlands - DCCEEW, accessed August 4, 2025
A guide to managing Box Gum Grassy Woodlands - DCCEEW, accessed August 4, 2025 Journal

Soil moisture release curves—What they are. Why you need them. How to use them., accessed May 15, 2025,

View Source

Supporting Sources (23)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Long-term estimates of live above-ground tree carbon stocks and net change in managed uneven-aged mixed species forests of sub-tropical Queensland, Australia" - ResearchGate, accessed May 15, 2025,
(PDF) Long-term estimates of live above-ground tree carbon stocks and net change in managed uneven-aged mixed species forests of sub-tropical Queensland, Australia" - ResearchGate, accessed May 15, 2025,
Contextual Support Journal

(PDF) Growth rates of Eucalyptus and other Australian native tree species derived from seven decades of growth monitoring - ResearchGate, accessed May 15, 2025,

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Preview of (PDF) Woodland habitat structures are affected by both agricultural land management and abiotic conditions - ResearchGate, accessed May 15, 2025,
(PDF) Woodland habitat structures are affected by both agricultural land management and abiotic conditions - ResearchGate, accessed May 15, 2025,
Contextual Support Journal

(PDF) Woodland habitat structures are affected by both agricultural land management and abiotic conditions - ResearchGate, accessed May 15, 2025,

View Source
Preview of A Guide to Soil Moisture - ConnectedCrops, accessed May 15, 2025,
A Guide to Soil Moisture - ConnectedCrops, accessed May 15, 2025,
Contextual Support GreyLiterature

A Guide to Soil Moisture - ConnectedCrops

View Source
Preview of Australia state of the environment 2021: land, accessed May 11, 2025
Australia state of the environment 2021: land, accessed May 11, 2025
Contextual Support Journal

Management Standards and Procedures for timber harvesting operations in Victoria’s State forests

View Source
Preview of Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO Publishing
Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO Publishing
Contextual Support Journal

Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO PUBLISHING | Soil Research, accessed August 28, 2025,

View Source
Preview of Edge type affects leaf-level water relations and estimated transpiration of Eucalyptus arenacea - Oxford Academic, accessed May 15, 2025,
Edge type affects leaf-level water relations and estimated transpiration of Eucalyptus arenacea - Oxford Academic, accessed May 15, 2025,
Contextual Support Journal

Edge type affects leaf-level water relations and estimated transpiration of Eucalyptus arenacea - Oxford Academic, accessed May 15, 2025,

View Source
Preview of espace.library.uq.edu.au, accessed May 15, 2025,
espace.library.uq.edu.au, accessed May 15, 2025,
Contextual Support Journal

Annual Research Report - 2021 Sustaining productive - The University of Western Australia, accessed May 15, 2025,

View Source
Preview of Evaluating the Relationship Between Vegetation Status and Soil Moisture in Semi-Arid Woodlands, Central Australia, Using Daily Thermal, Vegetation Index, and Reflectance Data - MDPI, accessed July 15, 2025
Evaluating the Relationship Between Vegetation Status and Soil Moisture in Semi-Arid Woodlands, Central Australia, Using Daily Thermal, Vegetation Index, and Reflectance Data - MDPI, accessed July 15, 2025
Contextual Support

Evaluating the Relationship Between Vegetation Status and Soil Moisture in Semi-Arid Woodlands, Central Australia, Using Daily Thermal, Vegetation Index, and Reflectance Data - MDPI, accessed August 28, 2025,

View Source
Preview of Growth, recruitment and attrition of Eucalyptus tree species in semi-arid temperate woodland | Request PDF - ResearchGate, accessed May 15, 2025,
Growth, recruitment and attrition of Eucalyptus tree species in semi-arid temperate woodland | Request PDF - ResearchGate, accessed May 15, 2025,
Contextual Support Journal

Growth, recruitment and attrition of Eucalyptus tree species in semi-arid temperate woodland | Request PDF - ResearchGate, accessed May 15, 2025,

View Source
Preview of Hypothesized overall topsoil disturbance typology in relation to... - ResearchGate, accessed May 15, 2025,
Hypothesized overall topsoil disturbance typology in relation to... - ResearchGate, accessed May 15, 2025,
Contextual Support Journal

Hypothesized overall topsoil disturbance typology in relation to... - ResearchGate, accessed May 15, 2025,

View Source
Preview of Munglinup Phytophthora Dieback occurence assessment - EPA WA
Munglinup Phytophthora Dieback occurence assessment - EPA WA
Contextual Support Journal

Differential impacts of soil salinity and water logging on Eucalyptus growth and carbon sequestration under mulched vs. unmulched soils in south-western Punjab, India - ResearchGate, accessed May 15, 2025,

View Source
Preview of NVIS Fact sheet MVG 5 – Eucalypt woodlands - DCCEEW, accessed August 5, 2025,
NVIS Fact sheet MVG 5 – Eucalypt woodlands - DCCEEW, accessed August 5, 2025,
Contextual Support Journal

Grey Box (Eucalyptus microcarpa) Grassy Woodlands and Derived Native Grasslands of South-eastern Australia, accessed August 12, 2025,

View Source
Preview of Public submission - Independent Planning Commission, accessed May 15, 2025,
Public submission - Independent Planning Commission, accessed May 15, 2025,
Contextual Support Journal

Public submission - Independent Planning Commission, accessed May 15, 2025,

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Preview of Public submission - Independent Planning Commission, accessed May 17, 2025,
Public submission - Independent Planning Commission, accessed May 17, 2025,
Contextual Support Journal

Species distribution and crown decline are associated with ..., accessed May 15, 2025,

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Preview of Soil – the driver of carbon dioxide variability over Australia, accessed July 16, 2025,
Soil – the driver of carbon dioxide variability over Australia, accessed July 16, 2025,
Contextual Support Government

Wired woodlands signal stress as climate dries - CSIRO, accessed August 28, 2025,

View Source
Preview of Soil moisture response to seasonal drought conditions and post‐thinning forest structure, accessed July 15, 2025,
Soil moisture response to seasonal drought conditions and post‐thinning forest structure, accessed July 15, 2025,
Contextual Support Journal

www.nrc.nsw.gov.au, accessed May 15, 2025,

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Preview of TERRESTRIAL HABITAT REQUIREMENTS OF A ... - QUT ePrints, accessed May 15, 2025,
TERRESTRIAL HABITAT REQUIREMENTS OF A ... - QUT ePrints, accessed May 15, 2025,
Contextual Support Journal

TERRESTRIAL HABITAT REQUIREMENTS OF A ... - QUT ePrints, accessed May 15, 2025,

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Preview of The researcher's complete guide to soil moisture - METER Group, accessed May 15, 2025,
The researcher's complete guide to soil moisture - METER Group, accessed May 15, 2025,
Methodology Source GreyLiterature

The researcher's complete guide to soil moisture - METER Group, accessed May 15, 2025,

View Source
Preview of Transpiration of Eucalyptus woodlands across a natural gradient of depth-to-groundwater
Transpiration of Eucalyptus woodlands across a natural gradient of depth-to-groundwater
Contextual Support Journal

Transpiration of Eucalyptus woodlands across a ... - Oxford Academic, accessed May 15, 2025,

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Preview of Transpiration of Eucalyptus woodlands across a natural gradient of depth-to-groundwater | Tree Physiology | Oxford Academic, accessed August 28, 2025,
Transpiration of Eucalyptus woodlands across a natural gradient of depth-to-groundwater | Tree Physiology | Oxford Academic, accessed August 28, 2025,
Contextual Support Journal

Transpiration of Eucalyptus woodlands across a natural gradient of depth-to-groundwater | Tree Physiology | Oxford Academic, accessed August 28, 2025,

View Source
Preview of Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2 ] - PubMed, accessed August 9, 2025
Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2 ] - PubMed, accessed August 9, 2025
Contextual Support Journal

(PDF) The impact of soil disturbance on root development in ..., accessed May 15, 2025

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Preview of What is soil moisture? The science behind the measurement - METER Group
What is soil moisture? The science behind the measurement - METER Group
Direct Evidence Journal

Irrigation Monitoringwith - Cotton - Texas A&M University, accessed May 15, 2025,

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Preview of Word template - blue - Queensland Government publications, accessed August 28, 2025,
Word template - blue - Queensland Government publications, accessed August 28, 2025,
Contextual Support Journal

Word template - blue - Queensland Government publications, accessed August 28, 2025,

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Production Forestry
  • Assessment Pristine Reference
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Superseded
  • Version 1
  • Effective From 24 Mar 2026
  • Effective To 24 Mar 2026

Notes

Lower Critical Threshold: 2 %. No upper detrimental threshold — higher values are always better up to natural saturation. Indicative VWC values at PWP vary by soil texture: 2-5% for loamy sands, 6-9% for sandy loams. Significant impairment begins before PWP is reached.

Related Benchmarks

Other benchmarks in the AUS-TDG-FOR-SMO family.

— % Moderate
Production Forestry · Pristine Reference
OptimalRange Active v2
— % Moderate
Production Forestry · Pristine Reference
CompositeFramework Active v1
— % Moderate
Production Forestry · Pristine Reference
OptimalRange Active v1