Soil Nitrogen — Benchmark Detail

Benchmark Value

No specific value — see range

Range: 600 to 1800 mg/kg

Optimal Range: 600 to 1800

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

Evidence & Context

An optimal range of approximately 600 mg/kg to 1800 mg/kg is proposed.

Metric Definition:

Optimal functional range for Total Soil Nitrogen in the topsoil

Benchmark Definition:

This benchmark defines the optimal functional range of total soil nitrogen in the topsoil for temperate semi-arid shrublands and open woodlands under production forestry, representing a safe operating space for ecosystem health and productivity.

Justification:

This range represents a safe operating space for maintaining long-term ecosystem health and productivity.

Sources (1)

Preview of Al-Beidh, S., & Al-Tawaha, A. R. M. (2023). Basic Properties and Mineralogy of Soils and Their Impact on the Growth of Jarrah Forest in Southwestern Australia. Land, 12(6), 1236.

Al-Beidh, S., & Al-Tawaha, A. R. M. (2023). Basic Properties and Mineralogy of Soils and Their Impact on the Growth of Jarrah Forest in Southwestern Australia. Land, 12(6), 1236. Journal

Soil Characteristics and Fertility of the Unique Jarrah Forest of Southwestern Australia, with Particular Consideration of Plant Nutrition and Land Rehabilitation - MDPI

View Source

Supporting Sources (1)

Additional references from the underlying research that informed this benchmark.

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

Context

Region Australia
Biome Temperate Semi-Arid Shrublands & Open Woodlands
Land Use Production Forestry
Assessment Not Stated
Evidence Type HealthyOperationalRange

Lifecycle

Status Active
Version 1
Effective From 10 Jun 2026

Notes

The range avoids critical deficiency while staying below the detrimental saturation point. AssessmentContext defaulted to 'Not Stated' because the source document did not state one.

Related Benchmarks

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