Soil Nitrogen

AUS-AKW-AGR-SON General Moderate confidence

Benchmark Value

1500 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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary OptimalRange Guard Point Guard LowerThreshold Guard OptimalRange Guard UpperThreshold Guard OptimalRange Guard Point Guard LowerThreshold Guard OptimalRange Guard

Evidence & Context

The derived benchmark for Total Soil Nitrogen in the topsoil (0-10 cm) is 1500 mg/kg.

Metric Definition:

Total Soil Nitrogen (0-10 cm depth)

Benchmark Definition:

This benchmark represents the typical total soil nitrogen concentration in the top 10 cm of soil in a high-health, regenerative agricultural cropping system within Australia's Arid Karstic Woodlands & Shrublands.

Justification:

Due to the absence of direct field measurements for this specific biome/land-use combination, the value is a synthesis of modelled baseline data from the CSIRO Soil and Landscape Grid of Australia (SLGA) for the target biome, and empirical field data from analogous, well-managed cropping systems on calcareous soils in semi-arid South Australia.

Sources (1)

Preview of Soil and Landscape Grid of Australia; Soil nitrogen availability in the cereal zone of South Australia. I. Soil organic carbon, total nitrogen, and nitrogen mineralisation rates

Soil and Landscape Grid of Australia; Soil nitrogen availability in the cereal zone of South Australia. I. Soil organic carbon, total nitrogen, and nitrogen mineralisation rates Government

Soil and Landscape Grid National Soil Attribute Maps - Total Nitrogen (3" resolution) - Release 2

View Source