Soil Electrical Conductivity (EC)

AUS-TMS-CON-SEC General Moderate confidence

Benchmark Value

No specific value — see range
Direction: Lower is desirable ↓
Form: CompositeFramework

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 Point Guard OptimalRange Guard OptimalRange Guard OptimalRange Guard MaximumOnly Guard Point Guard OptimalRange Guard MaximumOnly Guard Point Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard MaximumOnly Guard

Evidence & Context

Proposed Lower Critical Threshold: Not applicable in the context of salinity as a stressor.

Metric Definition:

The concept of a lower critical threshold for soil EC as a salinity stressor in Australian Tropical Monsoonal Savannas.

Benchmark Definition:

No ecologically meaningful lower critical threshold for soil EC in these naturally non-saline savanna ecosystems.

Justification:

The natural baseline EC is already extremely low, and any further decrease would still represent non-saline conditions to which the ecosystem is adapted.

Sources (1)

Preview of Rance, S.J., et al. (2024). Nutrient limitations to plantation tree growth on three contrasting low fertility soils in the Northern Territory, Australia. Soil Research, SR23128.
Rance, S.J., et al. (2024). Nutrient limitations to plantation tree growth on three contrasting low fertility soils in the Northern Territory, Australia. Soil Research, SR23128. Journal

Rance, S.J., et al. (2024). Nutrient limitations to plantation tree growth on three contrasting low fertility soils in the Northern Territory, Australia. Soil Research, SR23128

View Source

Supporting Sources (2)

Additional references from the underlying research that informed this benchmark.

Preview of Soil Electrical Conductivity - Natural Resources Conservation Service, accessed May 16, 2025,
Soil Electrical Conductivity - Natural Resources Conservation Service, accessed May 16, 2025,
Contextual Support Journal

USDA 12

View Source
Preview of TERN AusPlots soil data from Kakadu National Park.
TERN AusPlots soil data from Kakadu National Park.
Direct Evidence

TERN AusPlots soil data from Kakadu National Park

View Source

Context

  • Region Australia
  • Biome Tropical Monsoonal Savannas
  • Land Use Conservation / Protected Natural Areas
  • Assessment Pristine Reference
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 9 Jun 2026

Notes

This reflects the ecological understanding that these savannas are adapted to minimal ionic strength and that low EC is not a limiting factor.

Related Benchmarks

Other benchmarks in the AUS-TMS-CON-SEC family.

— dS/m High
Conservation / Protected Natural Areas · Pristine Reference
OptimalRange Active v1
0.2 dS/m High
Conservation / Protected Natural Areas · Pristine Reference
MaximumOnly Active v1