Soil Moisture

AUS-ASP-AGR-SMO General High confidence

Benchmark Value

12 %
Thresholds: Lower: 12, Upper: —
Direction: Higher is desirable ↑
Form: LowerThreshold

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 7 benchmarks together — the OptimalRange form drives the primary score, while 6 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary Point Guard OptimalRange Guard LowerThreshold Guard OptimalRange Guard OptimalRange Guard UpperThreshold Guard

Evidence & Context

Lower Critical Threshold: A volumetric water content (VWC) of approximately 12% (0.12 m3/m3). This value represents the critical soil moisture threshold (θcrit​), below which key ecosystem functions such as evapotranspiration and photosynthesis become significantly water-limited, leading to a rapid decline in ecosystem health and carbon uptake.

Metric Definition:

Volumetric water content (VWC) representing the critical soil moisture threshold (θcrit​) below which ecosystem functions are impaired.

Benchmark Definition:

Critical soil moisture threshold below which key ecosystem functions become water-limited in arid shrublands under agricultural crop production.

Justification:

This threshold is more ecologically sensitive than the traditional Permanent Wilting Point and signals significant impairment of ecosystem functions.

Sources (1)

Preview of Global critical soil moisture thresholds of plant water stress - PMC, accessed July 19, 2025,
Global critical soil moisture thresholds of plant water stress - PMC, accessed July 19, 2025, Journal

Modern Soil Moisture Monitoring for Drought Resilience, accessed May 11, 2025,

View Source

Supporting Sources (35)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Agricultural production system in arid and semi-arid regions - ResearchGate
(PDF) Agricultural production system in arid and semi-arid regions - ResearchGate
Contextual Support GreyLiterature

(PDF) Agricultural production system in arid and semi-arid regions - ResearchGate

View Source
Preview of A Health Check for our Agricultural Soils - Enviro Data SA, accessed July 16, 2025,
A Health Check for our Agricultural Soils - Enviro Data SA, accessed July 16, 2025,
Contextual Support Journal

Managing soils during and after drought in cropping systems - Fact sheet - Soil CRC

View Source
Preview of Chapter 8 - ET c under soil water stress conditions
Chapter 8 - ET c under soil water stress conditions
Irrelevant

Chapter 8 - ET c under soil water stress conditions

View Source
Preview of Critical soil moisture thresholds of plant water stress in terrestrial ecosystems - PMC
Critical soil moisture thresholds of plant water stress in terrestrial ecosystems - PMC
Methodology Source Government

Critical soil moisture thresholds of plant water stress in terrestrial ecosystems - PMC

View Source
Preview of Drought-resistant soils - Food and Agriculture Organization of the United Nations
Drought-resistant soils - Food and Agriculture Organization of the United Nations
Contextual Support Government

Drought-resistant soils - Food and Agriculture Organization of the United Nations

View Source
Preview of Exploring the Critical Role of Water in Regenerative Agriculture; Building Promises and Avoiding Pitfalls - Frontiers
Exploring the Critical Role of Water in Regenerative Agriculture; Building Promises and Avoiding Pitfalls - Frontiers
Contextual Support Journal

Exploring the Critical Role of Water in Regenerative Agriculture; Building Promises and Avoiding Pitfalls - Frontiers

View Source
Preview of FACTS soil moisture benchmarking tool - Integrated Crop Management
FACTS soil moisture benchmarking tool - Integrated Crop Management
Contextual Support GreyLiterature

FACTS soil moisture benchmarking tool - Integrated Crop Management

View Source
Preview of Farming systems - CSIRO
Farming systems - CSIRO
Contextual Support Journal

Farming systems - CSIRO

View Source
Preview of Find out the Different Types of Soil in Australia - Kelly Tillage AUS, accessed July 6, 2025,
Find out the Different Types of Soil in Australia - Kelly Tillage AUS, accessed July 6, 2025,
Contextual Support GreyLiterature

ASC - TENOSOLS - Soil Science Australia

View Source
Preview of Global critical soil moisture thresholds of plant water stress - ResearchGate, accessed August 28, 2025
Global critical soil moisture thresholds of plant water stress - ResearchGate, accessed August 28, 2025
Contextual Support Journal

Global critical soil moisture thresholds of plant water stress - ResearchGate

View Source
Preview of Healthy Soils for Sustainable Farms | FutureBeef
Healthy Soils for Sustainable Farms | FutureBeef
Contextual Support Journal

Healthy Soils for Sustainable Farms | FutureBeef, accessed August 4, 2025,

View Source
Preview of Improving soil moisture - NSW Department of Primary Industries
Improving soil moisture - NSW Department of Primary Industries
Contextual Support Journal

Improving soil moisture - NSW Department of Primary Industries

View Source
Preview of Living soils in agriculture | TERN Australia
Living soils in agriculture | TERN Australia
Contextual Support Government

Living soils in agriculture | TERN Australia

View Source
Preview of Managing soils - Department of Primary Industries and Regional Development, accessed August 12, 2025
Managing soils - Department of Primary Industries and Regional Development, accessed August 12, 2025
Contextual Support Government

Repairing gully erosion in Western Australia | Department of Primary ...

View Source
Preview of MANAGING SOILS DURING AND AFTER DROUGHT IN CROPPING SYSTEMS - Department for Environment and Water
MANAGING SOILS DURING AND AFTER DROUGHT IN CROPPING SYSTEMS - Department for Environment and Water
Contextual Support Journal

MANAGING SOILS DURING AND AFTER DROUGHT IN CROPPING SYSTEMS - Department for Environment and Water

View Source
Preview of Mapping global critical soil moisture threshold of plant water stress ..., accessed August 9, 2025
Mapping global critical soil moisture threshold of plant water stress ..., accessed August 9, 2025
Contextual Support Journal

Waterlogging : how it reduces plant growth and how plants can overcome its effects

View Source
Preview of NATIONAL PRINCIPLES AND GUIDELINES FOR RANGELAND MANAGEMENT
NATIONAL PRINCIPLES AND GUIDELINES FOR RANGELAND MANAGEMENT
Contextual Support Journal

NATIONAL PRINCIPLES AND GUIDELINES FOR RANGELAND MANAGEMENT

View Source
Preview of NATIONAL PRINCIPLES AND GUIDELINES FOR RANGELAND MANAGEMENT, accessed August 2, 2025,
NATIONAL PRINCIPLES AND GUIDELINES FOR RANGELAND MANAGEMENT, accessed August 2, 2025,
Contextual Support Journal

The effects of drought and climate variability on Australian farms - DAFF

View Source
Preview of No-Till and Reduced Tillage Farming: Revolutionizing Modern Agriculture Through Sustainable Soil Management
No-Till and Reduced Tillage Farming: Revolutionizing Modern Agriculture Through Sustainable Soil Management
Contextual Support Journal

No-Till and Reduced Tillage Farming: Revolutionizing Modern Agriculture Through Sustainable Soil Management

View Source
Preview of Plant available water capacity of dryland cropping soils in the south-eastern Australia, accessed August 6, 2025
Plant available water capacity of dryland cropping soils in the south-eastern Australia, accessed August 6, 2025
Contextual Support GreyLiterature

Soil Water Holding Characteristics | UC Agriculture and Natural Resources

View Source
Preview of PO 12. Know the relationship between soil water content, soil water tension and soil pore size and the following soil parameters (and qualitatively understand how these parameters vary for different soil types) and their relationships to plant growth and the fate and transport of nutrients and pesticides. - Northeast Region Certified Crop Adviser (NRCCA) Study Resources, accessed July 7, 2025,
PO 12. Know the relationship between soil water content, soil water tension and soil pore size and the following soil parameters (and qualitatively understand how these parameters vary for different soil types) and their relationships to plant growth and the fate and transport of nutrients and pesticides. - Northeast Region Certified Crop Adviser (NRCCA) Study Resources, accessed July 7, 2025,
Contextual Support GreyLiterature

PO 12. Know the relationship between soil water content, soil water tension and soil pore size and the following soil parameters (and qualitatively understand how these parameters vary for different soil types) and their relationships to plant growth and the fate and transport of nutrients and pesticides. - Northeast Region Certified Crop Adviser (NRCCA) Study Resources

View Source
Preview of Rain and potential evapotranspiration are the main drivers of yield for wheat and barley in southern Australia: insights from 12 - CSIRO Publishing
Rain and potential evapotranspiration are the main drivers of yield for wheat and barley in southern Australia: insights from 12 - CSIRO Publishing
Contextual Support Journal

Re-evaluating the contribution of summer fallow rain to wheat yield in southern Australia

View Source
Preview of Regenerative agriculture - Wikipedia, accessed August 8, 2025
Regenerative agriculture - Wikipedia, accessed August 8, 2025
Contextual Support

Regenerative agriculture - Wikipedia, accessed August 28, 2025

View Source
Preview of Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025
Regenerative agriculture in Australia: the changing face of farming - Frontiers, accessed August 4, 2025
Contextual Support Journal

NCC: Regenerative Agriculture and Soil Health - Wet Tropics Plan, accessed July 27, 2025,

View Source
Preview of Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI
Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI
Contextual Support Government

Forest Thinning for Ecosystem Restoration - Hidden Vale Research Station - The University of Queensland, accessed July 12, 2025,

View Source
Preview of Regenerative opportunities for building soil biological resilience – a ..., accessed May 11, 2025
Regenerative opportunities for building soil biological resilience – a ..., accessed May 11, 2025
Contextual Support GreyLiterature

Soil and fertilizer phosphorus: Effects on plant P supply and mycorrhizal development - Canadian Science Publishing, accessed August 28, 2025

View Source
Preview of Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Regenerative Organic Agriculture and Human Health: The Interconnection Between Soil, Food Quality, and Nutrition - PMC - PubMed Central, accessed July 7, 2025,
Contextual Support Journal

Cover cropping impacts on soil water and carbon in dryland cropping system - PMC

View Source
Preview of Risks to waterlogged crops - Business Queensland, accessed August 28, 2025
Risks to waterlogged crops - Business Queensland, accessed August 28, 2025
Contextual Support Government

Risks to waterlogged crops - Business Queensland, accessed May 11, 2025,

View Source
Preview of Soil Research - CSIRO PUBLISHING, accessed July 18, 2025,
Soil Research - CSIRO PUBLISHING, accessed July 18, 2025,
Contextual Support Journal

Modelling and prediction of soil water contents at field capacity and permanent wilting point of dryland cropping soils - CSIRO PUBLISHING | Soil Research

View Source
Preview of Soil Research - CSIRO PUBLISHING, accessed July 7, 2025
Soil Research - CSIRO PUBLISHING, accessed July 7, 2025
Contextual Support Journal

Impact of soil conditions on hydrology and water quality for a brown clay in the north-eastern cereal zone of Australia - CSIRO Publishing

View Source
Preview of Soil Water - Tas | Fact Sheets | soilquality.org.au, accessed August 4, 2025,
Soil Water - Tas | Fact Sheets | soilquality.org.au, accessed August 4, 2025,
Contextual Support Government

Soil Water - Tas | Fact Sheets | soilquality.org.au

View Source
Preview of The impact of soil water on soil constraints and crop growth - GRDC
The impact of soil water on soil constraints and crop growth - GRDC
Contextual Support Journal

The impact of soil water on soil constraints and crop growth - GRDC

View Source
Preview of Understanding Soil Water Content and Thresholds for Irrigation Management - OSU Extension
Understanding Soil Water Content and Thresholds for Irrigation Management - OSU Extension
Contextual Support Journal

Understanding Soil Water Content and Thresholds for Irrigation Management - OSU Extension

View Source
Preview of Understanding The Impacts Of Waterlogged Soils - AgSolutions
Understanding The Impacts Of Waterlogged Soils - AgSolutions
Contextual Support GreyLiterature

Understanding The Impacts Of Waterlogged Soils - AgSolutions

View Source
Preview of Wheat Crop under Waterlogging: Potential Soil and Plant Effects - MDPI, accessed August 28, 2025
Wheat Crop under Waterlogging: Potential Soil and Plant Effects - MDPI, accessed August 28, 2025
Contextual Support Journal

Effect of soil moisture at different temperatures on Rhizoctonia root rot of wheat seedlings

View Source

Context

  • Region Australia
  • Biome Arid Shrublands & Stony Plains
  • Land Use Agricultural Crop Production
  • Assessment Pristine Reference
  • Evidence Type DegradationThreshold

Lifecycle

  • Status Active
  • Version 1
  • Effective From 22 Mar 2026

Notes

Plants adapted to drylands have evolved mechanisms to sustain water extraction at very low moisture levels, but 12% VWC is a general benchmark for arid ecosystems. No upper detrimental threshold — higher values are always better up to natural saturation.

Related Benchmarks

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

12 % High
Agricultural Crop Production · Conservation Target
LowerThreshold Active v1
— % High
Agricultural Crop Production · Pristine Reference · primary growing season
OptimalRange Active v1
— % High
Agricultural Crop Production · Pristine Reference
OptimalRange Active v1
— % High
Agricultural Crop Production · Pristine Reference
OptimalRange Active v1
— % High
Agricultural Crop Production · Pristine Reference
OptimalRange Active v1