Soil Electrical Conductivity (EC)

AUS-AIF-AGR-SEC General Moderate confidence

Benchmark Value

No specific value — see range
Range: 1 to 4 dS/m
Optimal Range: 1 to 4
Direction: Lower is desirable ↓
Form: OptimalRange

Scoring Curve

This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.

Evidence & Context

Optimal Range: Generally, an ECe below 4 dS/m is desirable for supporting diverse crop production with optimal yields. However, for cracking clays (Vertosols), a slightly higher EC within this range (e.g., 1.0 - 4.0 dS/m ECe) may be optimal

Metric Definition:

Electrical Conductivity of the Saturated Soil Paste Extract (ECe)

Benchmark Definition:

For agricultural crop production in arid inland floodplains, soil electrical conductivity (ECe) between 1.0 and 4.0 dS/m is optimal, especially for cracking clays (Vertosols), supporting diverse crops and optimal yields.

Justification:

In cracking clays, a slightly higher EC within the non-saline range aids flocculation and prevents sodicity-induced structural degradation.

Sources (28)

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(PDF) Soil processes affecting crop production in salt-affected soils - ResearchGate Journal

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Influence of Soil Properties on Electrical Conductivity Under Humid Water Regimes

Influence of Soil Properties on Electrical Conductivity Under Humid Water Regimes

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Managing heavy clay soils of the Bland - NSW Department of Primary Industries

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Nutrient Supply to Floodplains | EARTH 111: Water: Science and Society - Penn State Government

Nutrient Supply to Floodplains | EARTH 111: Water: Science and Society - Penn State

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GUIDE TO SOIL TEST INTERPRETATION

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USDA 12

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Soil processes affecting crop production in salt-affected soils GreyLiterature

Soil processes affecting crop production in salt-affected soils

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The Sweet Secret to Balancing Electrical Conductivity in Soil - YouTube GreyLiterature

The Sweet Secret to Balancing Electrical Conductivity in Soil - YouTube

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Context

  • Region Australia
  • Biome Arid Inland Floodplains & Ephemeral River Systems
  • Land Use Agricultural Crop Production
  • Assessment Agricultural Crop Production
  • Evidence Type ReferenceCondition

Lifecycle

  • Status Active
  • Version 1
  • Effective From 7 Jun 2026

Notes

Reflects robust biological activity and efficient nutrient cycling.

Related Benchmarks

Other benchmarks in the AUS-AIF-AGR-SEC family.

4 dS/m Moderate
Agricultural Crop Production · Agricultural Crop Production
MaximumOnly Active v1
0 dS/m Moderate
Agricultural Crop Production · Agricultural Crop Production
MinimumOnly Active v1