Soil Nitrogen

AUS-TDG-FOR-SON General Moderate confidence

Benchmark Value

3330 mg/kg

Direction: Higher is desirable ↑

Form: Point

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 4 benchmarks together — the OptimalRange form drives the primary score, while 3 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary Point Guard Point Guard MinimumOnly Guard

Evidence & Context

This approach yields a reference benchmark for Total Soil Nitrogen of 3330 mg/kg.

Metric Definition:

Total Soil Nitrogen (TSN)

Benchmark Definition:

A reference benchmark for Total Soil Nitrogen derived using a proxy method based on Soil Organic Carbon and C:N ratios, specific to temperate dry woodlands and native grasslands under production forestry.

Justification:

Due to a significant data gap for direct Total Soil Nitrogen (TSN) measurements in this specific context, this benchmark is derived using a scientifically robust proxy method. A Soil Organic Carbon (SOC) level of 4.0% was combined with an ecologically appropriate Carbon:Nitrogen (C:N) ratio of 12:1.

Sources (2)

Preview of A review of sampling designs for the measurement of soil organic carbon in Australian grazing lands - Integrity Systems, accessed July 27, 2025,

A review of sampling designs for the measurement of soil organic carbon in Australian grazing lands - Integrity Systems, accessed July 27, 2025, Government

Total nitrogen levels as a key constraint on soil organic carbon ...

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 Journal

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

Supporting Sources (17)

Additional references from the underlying research that informed this benchmark.

Preview of Australia's forests – overview - DAFF

Australia's forests – overview - DAFF

Contextual Support

Approved Conservation Advice for the White Box - Yellow Box - Blakely's Red Gum Grassy Woodland and Derived Native Grassland - DCCEEW, accessed August 11, 2025,

Preview of Australia's Native Vegetation Framework - DAFF, accessed August 6, 2025,

Australia's Native Vegetation Framework - DAFF, accessed August 6, 2025,

Contextual Support Methodology Source Journal

risks and impacts of plant industries on soil condition - Department of Agriculture and Fisheries

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 GreyLiterature

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

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

Preview of Chapter 9 AUSTRALIAN GRASSLANDS - Food and Agriculture Organization of the United Nations, accessed August 5, 2025,

Chapter 9 AUSTRALIAN GRASSLANDS - Food and Agriculture Organization of the United Nations, accessed August 5, 2025,

Contextual Support Government

How Past Rainfall Shapes Australia's Dryland Ecosystems - Western Sydney University

Preview of Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO Publishing

Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO Publishing

Contextual Support Journal

Coarse woody debris reduces the rate of moisture loss from surface soils of cleared temperate Australian woodlands - CSIRO Publishing, accessed July 30, 2025

Preview of Determining baselines, drivers and trends of soil health and stability in New South Wales forests., accessed August 28, 2025,

Determining baselines, drivers and trends of soil health and stability in New South Wales forests., accessed August 28, 2025,

Contextual Support Direct Evidence Journal

Contribution of microbial activity and vegetation cover to the spatial distribution of soil respiration in mountains - Frontiers

Preview of Does diversity influence soil nitrate, light availability and productivity in the establishment phase of Australian temperate grassland reconstruction? - PubMed Central, accessed August 28, 2025,

Does diversity influence soil nitrate, light availability and productivity in the establishment phase of Australian temperate grassland reconstruction? - PubMed Central, accessed August 28, 2025,

Contextual Support Direct Evidence

Does diversity influence soil nitrate, light availability and productivity in the establishment phase of Australian temperate grassland reconstruction? - PubMed Central

Preview of Grassed up - Introduction - NSW Department of Primary Industries, accessed August 5, 2025,

Grassed up - Introduction - NSW Department of Primary Industries, accessed August 5, 2025,

Contextual Support Government

Why phosphorus is important - NSW Department of Primary Industries, accessed July 18, 2025

Preview of Long term accumulation of N in soils of dry mixed eucalypt forest in ..., accessed August 28, 2025,

Long term accumulation of N in soils of dry mixed eucalypt forest in ..., accessed August 28, 2025,

Contextual Support Journal

Increasing and declining native species in urban remnant grasslands respond differently to nitrogen addition and disturbance - PMC

Preview of Nitrogen Saturation in Temperate Forest Ecosystems, accessed August 28, 2025,

Nitrogen Saturation in Temperate Forest Ecosystems, accessed August 28, 2025,

Contextual Support Journal

Nitrogen Saturation in Temperate Forest Ecosystems

Preview of Refining benchmarks for soil organic carbon in Australia's temperate forests - ResearchGate, accessed August 28, 2025,

Refining benchmarks for soil organic carbon in Australia's temperate forests - ResearchGate, accessed August 28, 2025,

Contextual Support GreyLiterature

Refining benchmarks for soil organic carbon in Australia's temperate forests - ResearchGate

Preview of Soil nitrogen dynamics in natural forest ecosystem: a review - ResearchGate, accessed August 28, 2025,

Soil nitrogen dynamics in natural forest ecosystem: a review - ResearchGate, accessed August 28, 2025,

Contextual Support GreyLiterature

Soil nitrogen dynamics in natural forest ecosystem: a review - ResearchGate

Preview of Soil Nitrogen Supply | Fact Sheets | soilquality.org.au, accessed July 25, 2025,

Soil Nitrogen Supply | Fact Sheets | soilquality.org.au, accessed July 25, 2025,

Contextual Support Methodology Source Government

Nitrogen Fixation in Acacias - AgEcon Search, accessed July 30, 2025,

Preview of The changing the availability of nutrients in global grasslands | TERN Australia, accessed August 11, 2025

The changing the availability of nutrients in global grasslands | TERN Australia, accessed August 11, 2025

Contextual Support Direct Evidence Government

The changing the availability of nutrients in global grasslands | TERN Australia, accessed August 11, 2025,

Preview of The combined effect of fire and nitrogen addition on biodiversity and herbaceous aboveground productivity in a coastal shrubland - PMC, accessed August 28, 2025,

The combined effect of fire and nitrogen addition on biodiversity and herbaceous aboveground productivity in a coastal shrubland - PMC, accessed August 28, 2025,

Contextual Support Journal

Measuring plant-associated nitrogen fixation in agricultural systems, accessed August 4, 2025,

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

Contextual Support Government

Agriculture Victoria. (2025). Understanding soil tests for pastures. Farm Management.

Context

Region Australia
Biome Temperate Dry Woodlands & Native Grasslands
Land Use Production Forestry
Assessment Pristine Reference
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 26 May 2026

Notes

The value is a derived estimate, not a direct measurement from a best-practice site.