Soil Potassium

AUS-TMS-LVG-SOK General Low confidence

Benchmark Value

59 mg/kg

Direction: Higher is desirable ↑

Form: MinimumOnly

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 MaximumOnly Guard MaximumOnly Guard MinimumOnly Guard OptimalRange Guard MaximumOnly Guard OptimalRange Guard MinimumOnly Guard MaximumOnly Guard MinimumOnly Guard CompositeFramework Guard CompositeFramework Guard

Evidence & Context

Lower Critical Threshold Highly Tentative: <0.15 - 0.20 cmol(+)/kg (approx. <59-78 mg/kg K)

Metric Definition:

Exchangeable soil potassium (K), 0-10 cm soil depth

Benchmark Definition:

This benchmark defines the lower critical threshold of exchangeable soil potassium below which pasture productivity, plant health, or ecosystem functions may be impaired in tropical monsoonal savannas under livestock grazing.

Justification:

Below this, pasture responses to K are likely; forage K may become limiting for animal production.

Sources (13)

(PDF) Final report Scoping Study of Soil Management in Livestock Grazing Systems, accessed May 13, 2025,

AN ECOLOGICAL STUDY OF TARCHONANTHUS CAMPHORATUS L. IN THE NORTHERN CAPE PROVINCE OF SOUTH AFRICA

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18 Major Minerals in Forages - CABI Digital Library Journal

18 Major Minerals in Forages - CABI Digital Library

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Preview of Accessing disparate soil data | TERN Australia

Accessing disparate soil data | TERN Australia Government

(PDF) Final report Scoping Study of Soil Management in Livestock Grazing Systems

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Australian Soils and Landscapes | Monitoring & Data | TERN - esoil.io, accessed July 30, 2025, Government

Australian Soils and Landscapes | Monitoring & Data | TERN - esoil.io

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Preview of Do regenerative grazing management practices ... - CSIRO Publishing, accessed May 12, 2025

Do regenerative grazing management practices ... - CSIRO Publishing, accessed May 12, 2025 Journal

Investigating Intensive Grazing Systems in Northern Australia

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Edaphic, structural and physiological contrasts across Amazon Basin forest-savanna ecotones suggest a role for potassiu… - OUCI Journal

Edaphic, structural and physiological contrasts across Amazon Basin forest-savanna ecotones suggest a role for potassiu… - OUCI

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Preview of Multiple soil element and pH interactions constrain plant performance on tropical soils with a long history of fire - CSIRO PUBLISHING | Soil Research, accessed May 16, 2025,

Multiple soil element and pH interactions constrain plant performance on tropical soils with a long history of fire - CSIRO PUBLISHING | Soil Research, accessed May 16, 2025, Journal

Soil Research - CSIRO PUBLISHING

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Preview of Plantation tree growth responses to P, N, K and minor and trace elements on low fertility savanna soils - ResearchGate, accessed May 16, 2025,

Plantation tree growth responses to P, N, K and minor and trace elements on low fertility savanna soils - ResearchGate, accessed May 16, 2025, Journal

Agnote - Northern Territory Government

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Potassium Fertilization Alters the Morphogenetic, Structural, and Productive Characteristics of Panicum maximum Cultivars - MDPI Journal

Potassium Fertilization Alters the Morphogenetic, Structural, and Productive Characteristics of Panicum maximum Cultivars - MDPI

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Preventing rangeland degradation: a shared problem for Australia and China - CSIRO Publishing

Preventing rangeland degradation: a shared problem for Australia and China - CSIRO Publishing

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Preview of SOIL HEALTH AND SOIL QUALITY: A REVIEW | Request PDF - ResearchGate

SOIL HEALTH AND SOIL QUALITY: A REVIEW | Request PDF - ResearchGate Journal

A scenario calculator for effects of grazing land management on carbon stocks in Australian rangelands | Request PDF - ResearchGate

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Sustainable Development of Tropical Australia R&D for Management of Land, Water and Marine Resources Scoping Study Journal

Sustainable Development of Tropical Australia R&D for Management of Land, Water and Marine Resources Scoping Study

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Preview of The causes and consequences of Seriphium plumosum L. encroachment in semi-arid grassland communities of Gauteng Province, South - ResearchSpace@UKZN

The causes and consequences of Seriphium plumosum L. encroachment in semi-arid grassland communities of Gauteng Province, South - ResearchSpace@UKZN Journal

The causes and consequences of Seriphium plumosum L. encroachment in semi-arid grassland communities of Gauteng Province, South - ResearchSpace@UKZN

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Supporting Sources (1)

Additional references from the underlying research that informed this benchmark.

Does grazing exclusion in Australia's rangelands affect biomass and debris carbon stocks?

Contextual Support Journal

Does grazing exclusion in Australia's rangelands affect biomass and debris carbon stocks?

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Context

Region Australia
Biome Tropical Monsoonal Savannas
Land Use Livestock Grazing & Pasture
Assessment Not Stated
Evidence Type DegradationThreshold

Lifecycle

Status Active
Version 1
Effective From 8 Jun 2026

Notes

Value represents the lower bound of the tentative critical range (0.15 cmol(+)/kg). AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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