Soil Nitrogen

AUS-ASC-FOR-SON General Moderate confidence

Benchmark Value

No specific value — see range

Range: 3000 to 5000 mg/kg

Optimal Range: 3000 to 5000

Direction: Higher is desirable ↑

Form: OptimalRange

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 OptimalRange Guard LowerThreshold Guard UpperThreshold Guard Point Guard MinimumOnly Guard OptimalRange Guard MaximumOnly Guard Point Guard OptimalRange Guard Point Guard LowerThreshold Guard OptimalRange Guard UpperThreshold Guard Point Guard OptimalRange Guard MaximumOnly Guard Point Guard MinimumOnly Guard MaximumOnly Guard OptimalRange Guard OptimalRange Guard

Evidence & Context

Evidence from N-limited eucalypt plantations suggests that total nitrogen levels falling below a range of 3,000–5,000 mg/kg would likely indicate a system where nitrogen availability is critically limiting to both forest productivity and essential ecological functions.

Metric Definition:

Lower critical threshold for total soil nitrogen below which forest productivity and ecological functions are critically limited.

Benchmark Definition:

This benchmark represents the lower critical threshold range of total soil nitrogen in production forestry within the Alpine and Subalpine Complex biome of Australia, below which nitrogen availability limits forest productivity and essential ecological functions.

Justification:

Inferred from studies on nitrogen-limited eucalypt plantations indicating critical nitrogen limitation below this range.

Sources (1)

Preview of Nitrogen management in Eucalyptus nitens plantations - ResearchGate, accessed July 30, 2025,

Nitrogen management in Eucalyptus nitens plantations - ResearchGate, accessed July 30, 2025, Journal

Nitrogen management in Eucalyptus nitens plantations - ResearchGate

Supporting Sources (25)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Nitrogen dynamics in alpine soils of south-eastern Australia, accessed on May 31, 2025

(PDF) Nitrogen dynamics in alpine soils of south-eastern Australia, accessed on May 31, 2025

Contextual Support Journal

(PDF) Nitrogen dynamics in alpine soils of south-eastern Australia, accessed on May 28, 2025

Preview of A review of the potential impacts of different fire regimes on soil erosion and sedimentation, nutrient and carb, accessed May 27, 2025,

A review of the potential impacts of different fire regimes on soil erosion and sedimentation, nutrient and carb, accessed May 27, 2025,

Contextual Support

A review of the potential impacts of different fire regimes on soil erosion and sedimentation, nutrient and carb, accessed May 27, 2025,

Preview of Australia's forests – overview - DAFF, accessed on May 25, 2025,

Australia's forests – overview - DAFF, accessed on May 25, 2025,

Contextual Support Government

Australia's forests - DAFF, accessed May 19, 2025

Preview of Australia's State of the Forests Report - 2013 - Montreal Process, accessed May 27, 2025,

Australia's State of the Forests Report - 2013 - Montreal Process, accessed May 27, 2025,

Contextual Support Journal

Australia's State of the Forests Report - 2013 - Montreal Process, accessed May 27, 2025,

Preview of Australia's State of the Forests Report - DAFF, accessed August 10, 2025,

Australia's State of the Forests Report - DAFF, accessed August 10, 2025,

Contextual Support

Criterion 4: Conservation and maintenance of soil and water resources - DAFF, accessed May 26, 2025

Preview of Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 28, 2025,

Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC, accessed August 28, 2025,

Contextual Support Journal

Ryan, M. H., & Kirkegaard, J. A. (2012). The agronomic relevance of arbuscular mycorrhizas in the fertility of Australian extensive cropping systems. Agriculture, Ecosystems & Environment.

Preview of Australian Journal of Soil Research, accessed May 27, 2025,

Australian Journal of Soil Research, accessed May 27, 2025,

Contextual Support Journal

Australian Journal of Soil Research, accessed May 27, 2025,

Preview of Australian Soil Classification Map - TERN Data Discovery Portal, accessed August 28, 2025,

Australian Soil Classification Map - TERN Data Discovery Portal, accessed August 28, 2025,

Contextual Support Government

Australian Soil Classification Map - TERN Data Discovery Portal, accessed May 27, 2025,

Preview of Carbon and nitrogen in forest soils: Potential indicators for sustainable management of eucalypt forests in south-eastern Australia | Request PDF - ResearchGate, accessed May 27, 2025,

Carbon and nitrogen in forest soils: Potential indicators for sustainable management of eucalypt forests in south-eastern Australia | Request PDF - ResearchGate, accessed May 27, 2025,

Contextual Support Journal

Carbon and nitrogen in forest soils: Potential indicators for ...

Preview of Effects of harvesting intensity, vegetation control and fertilization on 5–20 year post-harvest N availability in boreal jack pine and black spruce forest soils in northern Ontario, Canada | Request PDF - ResearchGate, accessed May 27, 2025,

Effects of harvesting intensity, vegetation control and fertilization on 5–20 year post-harvest N availability in boreal jack pine and black spruce forest soils in northern Ontario, Canada | Request PDF - ResearchGate, accessed May 27, 2025,

Contextual Support Journal

Effects of harvesting intensity, vegetation control and fertilization on 5–20 year post-harvest N availability in boreal jack pine and black spruce forest soils in northern Ontario, Canada | Request PDF - ResearchGate, accessed May 27, 2025,

Preview of Effects of warming and nitrogen deposition on species and functional diversity of plant communities in the alpine meadow of Qinghai-Tibet Plateau | PLOS One, accessed May 27, 2025,

Effects of warming and nitrogen deposition on species and functional diversity of plant communities in the alpine meadow of Qinghai-Tibet Plateau | PLOS One, accessed May 27, 2025,

Contextual Support Journal

Effects of warming and nitrogen deposition on species and functional diversity of plant communities in the alpine meadow of Qinghai-Tibet Plateau | PLOS One, accessed May 27, 2025,

Preview of How do nitrogen-limited alpine coniferous forests acquire nitrogen? A rhizosphere perspective - SciOpen, accessed May 27, 2025,

How do nitrogen-limited alpine coniferous forests acquire nitrogen? A rhizosphere perspective - SciOpen, accessed May 27, 2025,

Contextual Support Journal

How do nitrogen-limited alpine coniferous forests acquire nitrogen? A rhizosphere perspective - SciOpen, accessed May 27, 2025,

Preview of Improved forest management - CSIRO, accessed July 12, 2025,

Improved forest management - CSIRO, accessed July 12, 2025,

Contextual Support Government

Ecosystem wicks: Woodland trees enhance water infiltration in a fragmented agricultural landscape in eastern Australia, accessed May 15, 2025,

Preview of Indicators and thresholds for nitrogen saturation in ... - WUR eDepot

Indicators and thresholds for nitrogen saturation in ... - WUR eDepot

Contextual Support Journal

Indicators and thresholds for nitrogen saturation in ... - WUR eDepot

Preview of Kirkpatrick, J. B., Bridle, K. L., & Wild, A. S. (2014). Soil carbon and nitrogen in Australian alpine and subalpine landscapes. Geoderma, 213, 39-49.

Kirkpatrick, J. B., Bridle, K. L., & Wild, A. S. (2014). Soil carbon and nitrogen in Australian alpine and subalpine landscapes. Geoderma, 213, 39-49.

Contextual Support Journal

Total nitrogen levels as a key constraint on soil organic carbon stocks across Australian agricultural soils - PubMed, accessed May 27, 2025,

Preview of Land Resources of the Dalrymple Shire - Volume Two (Appendices)

Land Resources of the Dalrymple Shire - Volume Two (Appendices)

Contextual Support Journal

Land Resources of the Dalrymple Shire - Volume Two (Appendices)

Preview of Nitrogen addition reduces dissolved organic carbon leaching in a montane forest | Request PDF - ResearchGate, accessed May 27, 2025,

Nitrogen addition reduces dissolved organic carbon leaching in a montane forest | Request PDF - ResearchGate, accessed May 27, 2025,

Contextual Support Journal

Nitrogen addition reduces dissolved organic carbon leaching in a montane forest | Request PDF - ResearchGate, accessed May 27, 2025,

Preview of Nitrogen dynamics in alpine soils of south ... - CSIRO Publishing, accessed August 28, 2025,

Nitrogen dynamics in alpine soils of south ... - CSIRO Publishing, accessed August 28, 2025,

Contextual Support Journal

Nitrogen dynamics in alpine soils of south-eastern Australia - CSIRO Publishing

Preview of Nitrogen restricts future sub-arctic treeline advance in an individual-based dynamic vegetation model - BG, accessed May 27, 2025,

Nitrogen restricts future sub-arctic treeline advance in an individual-based dynamic vegetation model - BG, accessed May 27, 2025,

Contextual Support Journal

Nitrogen restricts future sub-arctic treeline advance in an individual-based dynamic vegetation model - BG, accessed May 27, 2025,

Preview of Nutrient Limitation on Ecosystem Productivity and Processes of Mature and Old-Growth Subtropical Forests in China, accessed May 27, 2025,

Nutrient Limitation on Ecosystem Productivity and Processes of Mature and Old-Growth Subtropical Forests in China, accessed May 27, 2025,

Contextual Support Journal

Nutrient Limitation on Ecosystem Productivity and Processes of Mature and Old-Growth Subtropical Forests in China, accessed May 27, 2025,

Preview of Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and t

Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and t

Direct Evidence Journal

Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and topography

Preview of Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and topography | Request PDF - ResearchGate, accessed August 3, 2025,

Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and topography | Request PDF - ResearchGate, accessed August 3, 2025,

Contextual Support Direct Evidence Journal

Patterns of variation in Australian alpine soils and their relationships to parent material, vegetation formation, climate and topography | Request PDF - ResearchGate

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

Preview of Significant and persistent impact of timber harvesting on soil ..., accessed August 9, 2025,

Significant and persistent impact of timber harvesting on soil ..., accessed August 9, 2025,

Contextual Support Journal

Soil physical and hydrological properties following logging and ...

Preview of Soil and nutrient processes related to eucalypt forest dieback

Soil and nutrient processes related to eucalypt forest dieback

Contextual Support Journal

Macroecology of Australian Tall Eucalypt Forests: Baseline Data ...

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Production Forestry
Assessment Pristine Reference
Evidence Type DegradationThreshold

Lifecycle

Status Superseded
Version 2
Effective From 25 Mar 2026
Effective To 9 Apr 2026

Notes

This threshold is not definitively established but is a reasonable functional boundary based on available evidence.

Related Benchmarks

Other benchmarks in the AUS-ASC-FOR-SON family.