Soil Nitrogen

AUS-TDG-LVG-SON General Moderate confidence

Benchmark Value

3500 mg/kg
Direction: Higher is desirable ↑
Form: MaximumOnly

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

Evidence & Context

total N levels consistently exceeding approximately 3000-3500 mg/kg (0-10 cm) in these temperate woodland and grassland systems might indicate an altered, nutrient-enriched state prone to ecological degradation

Metric Definition:

Upper detrimental threshold for total soil nitrogen concentration in the top 0-10 cm soil layer above which ecological degradation is likely

Benchmark Definition:

Upper detrimental threshold beyond which risk of exotic species invasion and nutrient loss increases in temperate dry woodlands and native grasslands under livestock grazing.

Justification:

Studies indicate that levels above this range promote exotic species invasion and nutrient leaching.

Sources (1)

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 GreyLiterature

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

View Source

Supporting Sources (16)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Competition for Nitrogen between Australian Native Grasses ..., accessed May 11, 2025
(PDF) Competition for Nitrogen between Australian Native Grasses ..., accessed May 11, 2025
Contextual Support Journal

(PDF) Competition for Nitrogen between Australian Native Grasses ..., accessed May 11, 2025

View Source
Preview of (PDF) Livestock grazing management and biodiversity conservation ..., accessed May 11, 2025
(PDF) Livestock grazing management and biodiversity conservation ..., accessed May 11, 2025
Contextual Support GreyLiterature

(PDF) Livestock grazing management and biodiversity conservation ..., accessed May 11, 2025

View Source
Preview of (PDF) Managing cattle grazing intensity: effects on soil organic ...
(PDF) Managing cattle grazing intensity: effects on soil organic ...
Contextual Support Journal

Nitrogen In Soil Explained - Soil Quality Knowledge Base, accessed July 23, 2025

View Source
Preview of (PDF) Soil carbon and inferred net primary production in high- and ..., accessed May 11, 2025
(PDF) Soil carbon and inferred net primary production in high- and ..., accessed May 11, 2025
Contextual Support Journal

(PDF) Soil carbon and inferred net primary production in high- and ..., accessed May 11, 2025

View Source
Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 5, 2025,
Contextual Support Journal

How should we manage our soils to increase soil carbon?, accessed May 10, 2026

View Source
Preview of Environmental impact of nitrogen and phosphorus fertilisers in high rainfall areas of Western Australia - Department of Agriculture and Food, accessed May 11, 2025
Environmental impact of nitrogen and phosphorus fertilisers in high rainfall areas of Western Australia - Department of Agriculture and Food, accessed May 11, 2025
Contextual Support

Environmental impact of nitrogen and phosphorus fertilisers in high rainfall areas of Western Australia - Department of Agriculture and Food, accessed May 11, 2025

View Source
Preview of Grazing-management-for-soil-carbon-in-Australia-A-review.pdf - University of Tasmania, accessed on June 7, 2025,
Grazing-management-for-soil-carbon-in-Australia-A-review.pdf - University of Tasmania, accessed on June 7, 2025,
Contextual Support Journal

www.utas.edu.au, accessed May 11, 2025

View Source
Preview of Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 5, 2025,
Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 5, 2025,
Contextual Support GreyLiterature

(PDF) Identifying ecological barriers to restoration in temperate grassy woodlands: soil changes associated with different degradation states - ResearchGate, accessed August 4, 2025,

View Source
Preview of Managing competitive interactions to promote ... - CSIRO Publishing, accessed May 11, 2025
Managing competitive interactions to promote ... - CSIRO Publishing, accessed May 11, 2025
Contextual Support Journal

Managing competitive interactions to promote ... - CSIRO Publishing, accessed May 11, 2025

View Source
Preview of Natural Temperate Grassland of the South Eastern Highlands: a nationally protected ecological community - DCCEEW, accessed August 12, 2025,
Natural Temperate Grassland of the South Eastern Highlands: a nationally protected ecological community - DCCEEW, accessed August 12, 2025,
Contextual Support Journal

Natural Temperate Grassland of the South Eastern ... - DCCEEW

View Source
Preview of Nitrogen use efficiency and nitrogen balance in Australian farmlands - Agronomy Australia Proceedings, accessed May 11, 2025
Nitrogen use efficiency and nitrogen balance in Australian farmlands - Agronomy Australia Proceedings, accessed May 11, 2025
Contextual Support GreyLiterature

Nitrogen use efficiency and nitrogen balance in Australian farmlands - Agronomy Australia Proceedings, accessed May 11, 2025

View Source
Preview of Regenerative Farming | Solis for Life - Cell Squared, accessed May 11, 2025
Regenerative Farming | Solis for Life - Cell Squared, accessed May 11, 2025
Contextual Support GreyLiterature

Regenerative Farming | Solis for Life - Cell Squared, accessed May 11, 2025

View Source
Preview of Review of C:N Ratios in Vegetation, Litter and Soil Under Australian Native Forests and Plantations - DCCEEW
Review of C:N Ratios in Vegetation, Litter and Soil Under Australian Native Forests and Plantations - DCCEEW
Contextual Support Journal

Review of C:N Ratios in Vegetation, Litter and Soil ... - DCCEEW

View Source
Preview of Soil and Landscape Grid National Soil Attribute Maps - Total Nitrogen (3" resolution) - Release 2 - CSIRO Data Access Portal, accessed August 5, 2025,
Soil and Landscape Grid National Soil Attribute Maps - Total Nitrogen (3" resolution) - Release 2 - CSIRO Data Access Portal, accessed August 5, 2025,
Contextual Support Government

Geology | Norfolk Island National Park | Parks Australia

View Source
Preview of The Abundance of Microbial Functional Genes in Grassy Woodlands ..., accessed August 5, 2025,
The Abundance of Microbial Functional Genes in Grassy Woodlands ..., accessed August 5, 2025,
Contextual Support Journal

Grey Box (Eucalyptus microcarpa) Grassy Woodlands and Derived Native Grasslands of South-eastern Australia, accessed August 4, 2025,

View Source
Preview of What are the optimum nutrient targets for pastures? - Soil Health Knowledgebase, accessed August 5, 2025,
What are the optimum nutrient targets for pastures? - Soil Health Knowledgebase, accessed August 5, 2025,
Contextual Support Government

What are the optimum nutrient targets for pastures? - Soil Health Knowledgebase, accessed July 18, 2025

View Source

Context

  • Region Australia
  • Biome Temperate Dry Woodlands & Native Grasslands
  • Land Use Livestock Grazing & Pasture
  • Assessment Not Stated
  • Evidence Type DegradationThreshold

Lifecycle

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

Notes

Levels exceeding this range significantly increase the risk of exotic species invasion, nutrient imbalances, nitrate leaching, and soil acidification. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.