Soil Organic Carbon (SOC)

AUS-ASC-AGR-SOC General Moderate confidence

Benchmark Value

No specific value — see range

Range: 14 to 22 %

Optimal Range: 14 to 22

Direction: Higher is desirable ↑

Form: OptimalRange

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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary OptimalRange Guard MinimumOnly Guard LowerThreshold Guard OptimalRange Guard Point Guard LowerThreshold Guard OptimalRange Guard OptimalRange Guard Point Guard

Evidence & Context

This benchmark is a proxy derived from the natural reference condition, representing the mean SOC% (0-5 cm depth) in healthy, well-developed mineral soils (Dermosols) under native vegetation in the Australian Alps.

Metric Definition:

Soil Organic Carbon (SOC) percentage in the top 0-5 cm of soil under native vegetation in the Australian Alps mineral soils.

Benchmark Definition:

The mean soil organic carbon percentage in healthy, well-developed mineral soils (Dermosols) under native vegetation in the Australian Alps, representing the highest achievable ecological health state as a proxy for agricultural cropping land use.

Justification:

No direct data exists for agricultural cropping in this biome. This benchmark is a proxy derived from the natural reference condition representing the highest achievable state of ecological health.

Sources (1)

Preview of Kirkpatrick, J.B., Green, K., Bridle, K.L. and Venn, S.E. (2014) Patterns of Variation in Australian Alpine Soils and Their Relationships to Parent Material, Vegetation Formation, Climate and Topography. CATENA, 121, 186-194. - References - Scientific Research Publishing

Kirkpatrick, J.B., Green, K., Bridle, K.L. and Venn, S.E. (2014) Patterns of Variation in Australian Alpine Soils and Their Relationships to Parent Material, Vegetation Formation, Climate and Topography. CATENA, 121, 186-194. - References - Scientific Research Publishing Journal

Kirkpatrick, J.B., Green, K., Bridle, K.L. and Venn, S.E. (2014) Patterns of Variation in Australian Alpine Soils and Their Relationships to Parent Material, Vegetation Formation, Climate and Topography. CATENA, 121, 186-194. - References - Scientific Research Publishing, accessed August 3, 2025,

Supporting Sources (26)

Additional references from the underlying research that informed this benchmark.

Preview of Addressing the rundown of nitrogen and soil organic carbon - GRDC, accessed July 25, 2025,

Addressing the rundown of nitrogen and soil organic carbon - GRDC, accessed July 25, 2025,

Contextual Support Direct Evidence Journal

CRITICAL SOIL ORGANIC CARBON RANGE FOR OPTIMAL CROP RESPONSE TO MINERAL FERTILISER NITROGEN ON A FERRALSOL | Experimental Agriculture - Cambridge University Press

Preview of Alpine complex | NSW Environment, Energy and Science, accessed August 3, 2025,

Alpine complex | NSW Environment, Energy and Science, accessed August 3, 2025,

Contextual Support Government

Alpine complex | NSW Environment, Energy and Science, accessed August 3, 2025,

Preview of Alpine soils in Australia with reference to conditions in Europe and New Zealand, accessed August 28, 2025,

Alpine soils in Australia with reference to conditions in Europe and New Zealand, accessed August 28, 2025,

Contextual Support Journal

Alpine soils in Australia with reference to conditions in Europe and New Zealand, accessed August 3, 2025,

Preview of Australia Production - International Production Assessment Division (IPAD), accessed August 3, 2025,

Australia Production - International Production Assessment Division (IPAD), accessed August 3, 2025,

Contextual Support

Eyre Peninsula Farming Systems Summary 2024 - PIRSA, accessed July 23, 2025

Preview of Australian Alps - DCCEEW, accessed August 3, 2025,

Australian Alps - DCCEEW, accessed August 3, 2025,

Contextual Support Government

State forests around Bombala - Forestry Corporation, accessed August 17, 2025,

Preview of Australian Alps Bioregion | ETA Unknown, accessed August 3, 2025,

Australian Alps Bioregion | ETA Unknown, accessed August 3, 2025,

Contextual Support GreyLiterature

Australian Alps Bioregion | ETA Unknown, accessed August 3, 2025,

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

Karst and agriculture in Australia - Digital Commons @ USF, accessed July 26, 2025,

Preview of critical soil organic carbon range for optimal crop response to mineral fertiliser nitrogen on a ferralsol - ResearchGate, accessed August 3, 2025,

critical soil organic carbon range for optimal crop response to mineral fertiliser nitrogen on a ferralsol - ResearchGate, accessed August 3, 2025,

Contextual Support

CRITICAL SOIL ORGANIC CARBON RANGE FOR OPTIMAL CROP ...

Preview of CRITICAL SOIL ORGANIC CARBON RANGE FOR OPTIMAL CROP RESPONSE TO MINERAL FERTILISER NITROGEN ON A FERRALSOL By PATRICK MUSINGUZI - Cambridge University Press, accessed August 3, 2025,

CRITICAL SOIL ORGANIC CARBON RANGE FOR OPTIMAL CROP RESPONSE TO MINERAL FERTILISER NITROGEN ON A FERRALSOL By PATRICK MUSINGUZI - Cambridge University Press, accessed August 3, 2025,

Contextual Support

CRITICAL SOIL ORGANIC CARBON RANGE FOR OPTIMAL CROP RESPONSE TO MINERAL FERTILISER NITROGEN ON A FERRALSOL By PATRICK MUSINGUZI - Cambridge University Press, accessed August 3, 2025,

Preview of grazing - in THE AUSTRALIAN ALPS, accessed August 3, 2025,

grazing - in THE AUSTRALIAN ALPS, accessed August 3, 2025,

Contextual Support Journal

grazing - in THE AUSTRALIAN ALPS, accessed on May 31, 2025

Preview of Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau - ResearchGate, accessed August 3, 2025,

Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau - ResearchGate, accessed August 3, 2025,

Contextual Support

Impacts of management practices on soil organic carbon in degraded alpine meadows on the Tibetan Plateau - ResearchGate, accessed August 3, 2025,

Preview of Mechanisms Behind the Soil Organic Carbon Response to Temperature Elevations - MDPI, accessed August 3, 2025,

Mechanisms Behind the Soil Organic Carbon Response to Temperature Elevations - MDPI, accessed August 3, 2025,

Contextual Support Journal

Mechanisms Behind the Soil Organic Carbon Response to Temperature Elevations - MDPI, accessed August 3, 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 dynamics in alpine soils of south-eastern Australia - CSIRO Publishing, accessed August 3, 2025,

Nitrogen dynamics in alpine soils of south-eastern Australia - CSIRO Publishing, accessed August 3, 2025,

Contextual Support Journal

Nitrogen dynamics in alpine soils of south-eastern Australia - CSIRO Publishing, accessed August 5, 2025

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 Journal

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

Preview of Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 5, 2025,

Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 5, 2025,

Direct Evidence Journal

Regenerative Agriculture—A Literature Review on the Practices and Mechanisms Used to Improve Soil Health - MDPI, accessed August 28, 2025,

Preview of Seasonal Mineralisation of Organic Matter in Alpine Soils and Responses to Global Warming: An In Vitro Approach - Bohrium, accessed August 3, 2025,

Seasonal Mineralisation of Organic Matter in Alpine Soils and Responses to Global Warming: An In Vitro Approach - Bohrium, accessed August 3, 2025,

Contextual Support Journal

Seasonal Mineralisation of Organic Matter in Alpine Soils and Responses to Global Warming: An In Vitro Approach - Bohrium, accessed August 3, 2025,

Preview of Snapshot of Australian Agriculture 2025 - DAFF, accessed July 8, 2025

Snapshot of Australian Agriculture 2025 - DAFF, accessed July 8, 2025

Contextual Support Government

Snapshot of Australian Agriculture 2025 - DAFF, accessed July 23, 2025

Preview of Soil Carbon Saturation: What Do We Really Know? - PMC

Soil Carbon Saturation: What Do We Really Know? - PMC

Contextual Support Journal

Soil Carbon Saturation: What Do We Really Know? - PMC

Preview of Soil Carbon Saturation: What Do We Really Know? (Journal Article) | OSTI.GOV, accessed August 3, 2025,

Soil Carbon Saturation: What Do We Really Know? (Journal Article) | OSTI.GOV, accessed August 3, 2025,

Contextual Support Journal

(PDF) Mapping soil organic carbon fractions for Australia, their stocks, and uncertainty

Preview of Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - JRC Publications Repository, accessed August 3, 2025,

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - JRC Publications Repository, accessed August 3, 2025,

Contextual Support GreyLiterature

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - JRC Publications Repository

Preview of Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - ResearchGate, accessed July 25, 2025,

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - ResearchGate, accessed July 25, 2025,

Contextual Support Direct Evidence Journal

Soil Organic Carbon Thresholds and Nitrogen Management in Tropical Agroecosystems: Concepts and Prospects - ResearchGate, accessed August 28, 2025,

Preview of The Benefits of Soil Organic Carbon on Agricultural Practices - SoilOptix, accessed August 3, 2025,

The Benefits of Soil Organic Carbon on Agricultural Practices - SoilOptix, accessed August 3, 2025,

Contextual Support GreyLiterature

The Benefits of Soil Organic Carbon on Agricultural Practices - SoilOptix, accessed August 3, 2025,

Preview of theaustralianalpsnationalparks.org, accessed on May 25, 2025,

theaustralianalpsnationalparks.org, accessed on May 25, 2025,

Contextual Support Journal

theaustralianalpsnationalparks.org

Preview of water catchment - Australian Alps National Parks, accessed August 17, 2025,

water catchment - Australian Alps National Parks, accessed August 17, 2025,

Contextual Support Journal

water catchment - Australian Alps National Parks, accessed August 3, 2025,

Preview of www.environment.nsw.gov.au, accessed on May 25, 2025,

www.environment.nsw.gov.au, accessed on May 25, 2025,

Contextual Support

Australian Alps Montane Grasslands | One Earth, accessed on May 31, 2025

Context

Region Australia
Biome Alpine and Subalpine Complex
Land Use Agricultural Crop Production
Assessment Pristine Reference
Evidence Type ReferenceCondition

Lifecycle

Status Active
Version 1
Effective From 16 Mar 2026

Notes

Lower Boundary: Generic agricultural thresholds (~2% SOC) are inappropriate. Optimal Range: synonymous with the 14–22% reference benchmark. Upper Boundary: No evidence exists for a detrimental upper threshold; higher SOC indicates greater ecosystem health and resilience.