Soil Moisture

AUS-TGP-CON-SMO General Moderate confidence

Benchmark Value

10 % VWC

Direction: Higher 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 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MinimumOnly Guard

Evidence & Context

Plant water stress and reduced productivity occur below approximately 10-12% VWC for Sandy soils

Metric Definition:

Soil volumetric water content (VWC)

Benchmark Definition:

This benchmark marks the critical lower soil moisture threshold below which plant water stress and reduced productivity occur in sandy soils of temperate grassy woodlands and plains under conservation.

Justification:

Marks a critical transition to a water-limited ecosystem state where plant water stress and reduced productivity occur.

Sources (2)

Preview of The important role of soil texture on water - Crops and Soils, accessed July 6, 2025,

The important role of soil texture on water - Crops and Soils, accessed July 6, 2025, GreyLiterature

Infiltration.pdf - Natural Resources Conservation Service, accessed July 7, 2025

View Source

Understorey productivity in temperate grassy woodland responds to soil water availability...

View Source

Supporting Sources (5)

Additional references from the underlying research that informed this benchmark.

Drought-related tree death of savanna eucalypts: Species susceptibility, soil conditions and root architecture - ResearchGate

Contextual Support Journal

Drought-related tree death of savanna eucalypts: Species susceptibility, soil conditions and root architecture - ResearchGate

View Source

Global critical soil moisture thresholds of plant water stress - ResearchGate, accessed August 28, 2025

Direct Evidence GreyLiterature

Soil moisture as an indicator of growing-season herbaceous fuel moisture and curing rate in grasslands - ResearchGate

View Source

Great Western Woodlands Flux Data Collection - TERN Data ..., accessed August 12, 2025,

Direct Evidence Government

Cumberland Plain SuperSite | Biogeochemical Fluxes & Climate

View Source

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

Methodology Source Government

Soil and Landscape Grid of Australia - CSIRO

View Source

Preview of Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2] - University of Wollongong Research Online

Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2] - University of Wollongong Research Online

Contextual Support Journal

Understorey productivity in temperate grassy woodland responds to soil water availability but not to elevated [CO2] - University of Wollongong Research Online

View Source

Context

Region Australia
Biome Temperate Grassy Woodlands & Plains
Land Use Conservation / Protected Natural Areas
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 7 Jun 2026

Notes

Range provided as 10-12%; lower bound used as the critical threshold. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TGP-CON-SMO family.