Soil Potassium

AUS-TSW-LVG-SOK General Moderate confidence

Benchmark Value

100 mg/kg
Thresholds: Lower: 100, Upper: —
Direction: Lower 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 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary LowerThreshold Guard

Evidence & Context

Based on pasture management guidelines, the lower critical threshold (the point at which the system becomes "Marginal" or "Deficient") is defined as: Sandy/Silty Loams: < 100 mg/kg, with severe deficiency < 50 mg/kg.

Metric Definition:

Lower critical threshold of soil potassium below which ecosystem function is impaired.

Benchmark Definition:

Lower critical threshold of soil potassium below which ecosystem function is impaired in sandy/silty loam soils.

Justification:

The threshold is based on pasture management guidelines indicating marginal or deficient status below this level.

Sources (1)

Preview of Potassium for high-performing pastures
Potassium for high-performing pastures GreyLiterature

Potassium for high-performing pastures | Nutrient Advantage

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Supporting Sources (35)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Livestock grazing management and biodiversity conservation in Australian temperate grassy landscapes - ResearchGate, accessed May 11, 2025
(PDF) Livestock grazing management and biodiversity conservation in Australian temperate grassy landscapes - ResearchGate, accessed May 11, 2025
Contextual Support GreyLiterature

section 2 water quality in the darwin region - Environment and Natural Resources

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(PDF) Soil potassium—crop response calibration relationships and criteria for field crops grown in Australia - ResearchGate, accessed July 18, 2025,
Contextual Support Journal

Nutrient Cycling in Australian Savannas on JSTOR - DOI

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Preview of Crop and Pasture Science - CSIRO PUBLISHING, accessed July 10, 2025
Crop and Pasture Science - CSIRO PUBLISHING, accessed July 10, 2025
Contextual Support Journal

Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - CSIRO Publishing, accessed July 17, 2025

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Preview of Dairy effluent — disease and animal health - Agriculture Victoria, accessed July 10, 2025
Dairy effluent — disease and animal health - Agriculture Victoria, accessed July 10, 2025
Contextual Support Government

Dairy effluent — disease and animal health - Agriculture Victoria, accessed July 10, 2025

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Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed August 5, 2025,
Contextual Support Journal

Ludwig, J.A., Bastin, G.N., Chewings, V.H., Eager, R.W., and Liedloff, A.C. (2005). Clearing savannas for use as rangelands in Queensland: Altered landscapes and water-erosion processes. Rangeland Journal, 27(2), 135-149.

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Preview of Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from, accessed August 5, 2025,
Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from, accessed August 5, 2025,
Contextual Support

The effect of climate change on pastoralism in the Australian arid and semi-arid rangelands - Nuffield Farming Scholarships, accessed July 29, 2025,

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Preview of Effects of Stock Grazing on Biodiversity Values in ... - ACT Government, accessed August 4, 2025
Effects of Stock Grazing on Biodiversity Values in ... - ACT Government, accessed August 4, 2025
Contextual Support Journal

Yellow Box – Blakely's Red Gum Grassy Woodland and Derived ...

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Preview of Environmental Protection Works Guideline on Rural Regulated Land Sustainable Grazing Allowable Activity, accessed July 10, 2025
Environmental Protection Works Guideline on Rural Regulated Land Sustainable Grazing Allowable Activity, accessed July 10, 2025
Contextual Support Regulatory Framework

Sustainable grazing Guideline. Native Vegetation. Allowable Activity.

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Preview of Fertilising Pastures - Soil Health Knowledgebase, accessed July 10, 2025
Fertilising Pastures - Soil Health Knowledgebase, accessed July 10, 2025
Contextual Support Journal

Fertilising Pastures - Soil Health Knowledgebase, accessed July 10, 2025

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Preview of Grass Tetany - Main Street Veterinary Clinic, accessed July 10, 2025
Grass Tetany - Main Street Veterinary Clinic, accessed July 10, 2025
Contextual Support GreyLiterature

Grass Tetany - Main Street Veterinary Clinic, accessed July 10, 2025

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Preview of Grass Tetany in Cattle - Local Land Services, accessed July 10, 2025
Grass Tetany in Cattle - Local Land Services, accessed July 10, 2025
Contextual Support Government

Grass Tetany in Cattle - Local Land Services, accessed July 10, 2025

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Preview of Grazing management of Australian native woody regeneration as an effective nature-based climate-change solution - CSIRO Publishing, accessed July 10, 2025,
Grazing management of Australian native woody regeneration as an effective nature-based climate-change solution - CSIRO Publishing, accessed July 10, 2025,
Contextual Support Journal

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space for time study in the Great Barrier Reef catchments - CSIRO Research Publications Repository, accessed July 23, 2025

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Preview of Great Western Woodlands - Wikipedia, accessed July 10, 2025,
Great Western Woodlands - Wikipedia, accessed July 10, 2025,
Contextual Support GreyLiterature

Great Western Woodlands - Wikipedia

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Preview of How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers, accessed August 5, 2025,
How Biodiversity-Friendly Is Regenerative Grazing? - Frontiers, accessed August 5, 2025,
Contextual Support Journal

The Science behind Regenerative Agriculture

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Preview of Hypocalcaemia / Milk fever | Meat & Livestock Australia - MLA, accessed July 10, 2025
Hypocalcaemia / Milk fever | Meat & Livestock Australia - MLA, accessed July 10, 2025
Contextual Support GreyLiterature

Hypocalcaemia / Milk fever | Meat & Livestock Australia - MLA, accessed July 10, 2025

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Preview of Livestock Factsheet - Grass Tetany - Victorian Farmers Federation, accessed July 10, 2025
Livestock Factsheet - Grass Tetany - Victorian Farmers Federation, accessed July 10, 2025
Contextual Support Journal

Livestock Factsheet - Grass Tetany - Victorian Farmers Federation, accessed July 10, 2025

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Preview of Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - BioOne Complete, accessed July 10, 2025
Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - BioOne Complete, accessed July 10, 2025
Contextual Support Journal

Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - BioOne Complete

View Source
Preview of Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - CSIRO PUBLISHING | Crop and Pasture Science, accessed July 10, 2025
Long-term rundown of plant-available potassium in Western Australia requires a re-evaluation of potassium management for grain production: a review - CSIRO PUBLISHING | Crop and Pasture Science, accessed July 10, 2025
Contextual Support Journal

Potassium Control of Plant Functions: Ecological and Agricultural Implications - PMC

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Preview of Managing cattle grazing intensity: effects on soil organic matter and soil nitrogen, accessed August 5, 2025,
Managing cattle grazing intensity: effects on soil organic matter and soil nitrogen, accessed August 5, 2025,
Contextual Support Journal

Is tree planting enough? Investigation of soil condition and composition of vegetation and invertebrate assemblages after ecological restoration in agricultural landscapes - Murdoch Research Portal, accessed July 23, 2025

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Preview of NVIS Fact sheet MVG 14 – Mallee woodlands and shrublands - DCCEEW, accessed July 15, 2025
NVIS Fact sheet MVG 14 – Mallee woodlands and shrublands - DCCEEW, accessed July 15, 2025
Contextual Support Journal

NVIS Fact sheet MVG 14 – Mallee woodlands and shrublands - DCCEEW, accessed August 28, 2025

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Preview of POTASSIUM - Incitec Pivot Fertilisers, accessed July 10, 2025
POTASSIUM - Incitec Pivot Fertilisers, accessed July 10, 2025
Contextual Support Journal

POTASSIUM - Incitec Pivot Fertilisers, accessed July 10, 2025

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Preview of Potassium | Fact Sheets | soilquality.org.au, accessed July 10, 2025
Potassium | Fact Sheets | soilquality.org.au, accessed July 10, 2025
Contextual Support Government

Do regenerative grazing management practices improve vegetation and soil health in grazed rangelands? Preliminary insights from a space-for-time study in the Great Barrier Reef catchments, Australia - CSIRO Publishing, accessed July 17, 2025

View Source
Preview of Potassium for high-performing pastures | Nutrient Advantage, accessed July 10, 2025
Potassium for high-performing pastures | Nutrient Advantage, accessed July 10, 2025
Contextual Support GreyLiterature

A review of plantations as a water intercepting land use in South Australia, accessed August 9, 2025

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Preview of Potassium for high-performing pastures | Nutrient Advantage, accessed July 18, 2025,
Potassium for high-performing pastures | Nutrient Advantage, accessed July 18, 2025,
Contextual Support Journal

Potassium for high rainfall pastures - DPIRD's Digital library

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Preview of Potassium In Soil Explained - Soil Quality Knowledge Base, accessed August 11, 2025,
Potassium In Soil Explained - Soil Quality Knowledge Base, accessed August 11, 2025,
Contextual Support GreyLiterature

Healthy soils and soil test interpretation - North Central Catchment Management Authority

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Preview of Potassium: planning and pitfalls | Dairy News Australia, accessed July 10, 2025
Potassium: planning and pitfalls | Dairy News Australia, accessed July 10, 2025
Contextual Support GreyLiterature

Potassium: planning and pitfalls | Dairy News Australia, accessed July 10, 2025

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Preview of Regenerative Grazing Affects Biodiversity - Frontiers, accessed July 10, 2025,
Regenerative Grazing Affects Biodiversity - Frontiers, accessed July 10, 2025,
Contextual Support Journal

Climate change mitigation as a co-benefit of regenerative ranching: insights from Australia and the United States - PMC, accessed July 10, 2025

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Preview of Restoration of degraded grazing country in the semi-arid areas of ..., accessed July 10, 2025,
Restoration of degraded grazing country in the semi-arid areas of ..., accessed July 10, 2025,
Contextual Support Journal

Maintain and improve groundcover - Local Land Services

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Preview of Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )
Semi-arid woodlands (shrubby sub-formation) | NSW Environment, Energy and Science, accessed July 12, 2025, )
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Semi-arid woodlands (grassy sub-formation) | NSW Environment, Energy and Science

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Soil and plant testing and analysis. FAO Soils Bulletin No. 38/1, accessed July 10, 2025
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Soil and plant testing and analysis. FAO Soils Bulletin No. 38/1, accessed July 10, 2025

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Preview of Soil nutrient critical limits | MBFP | More Beef from Pastures - MLA, accessed May 13, 2025,
Soil nutrient critical limits | MBFP | More Beef from Pastures - MLA, accessed May 13, 2025,
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Understanding soil tests for pastures | Soil | Farm management ..., accessed July 17, 2025

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Preview of Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
Southeast Australia temperate savanna - Wikipedia, accessed August 4, 2025
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Preview of Understanding soil tests for pastures | Soil | Farm management ..., accessed May 12, 2025
Understanding soil tests for pastures | Soil | Farm management ..., accessed May 12, 2025
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Preview of www.barrierreef.org, accessed on May 25, 2025,
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Contextual Support Journal

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Context

  • Region Australia
  • Biome Temperate Semi-Arid Shrublands & Open Woodlands
  • Land Use Livestock Grazing & Pasture
  • Assessment Not Stated
  • Evidence Type DegradationThreshold

Lifecycle

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

Notes

Levels below this threshold risk the loss of perennial pasture components and increased soil erosion risk. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

Other benchmarks in the AUS-TSW-LVG-SOK family.

— mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
OptimalRange Active v1
— mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
OptimalRange Active v1
— mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
OptimalRange Active v1
— mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
OptimalRange Active v1
90 mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
LowerThreshold Active v1
120 mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
LowerThreshold Active v1
250 mg/kg Moderate
Livestock Grazing & Pasture · Not Stated
MaximumOnly Active v1