Soil Nitrogen
Benchmark Value
Scoring Curve
This curve shows how a field measurement for this indicator would score across all available benchmark forms in this context.
Evidence & Context
The benchmark represents the total nitrogen (TN) range for high-health loamy to clayey soils under best-practice regenerative agriculture. It is derived by triangulating two lines of evidence: 1) TN values calculated from the widely accepted 2-2.5% soil organic carbon (SOC) threshold for maintaining soil quality in the tropics, and 2) the functional state required to support the 'High' Soil Nitrogen Supply (50-125 mg/kg) identified as optimal for these soil types by Soil Quality Australia.
Total nitrogen concentration in soil representing the functional and sustainable nitrogen stock supporting high-health agricultural systems in tropical and subtropical rainforest biomes.
This benchmark defines the total nitrogen concentration range in soil that supports healthy, high-functioning agricultural systems in tropical and subtropical rainforest regions with loamy to clayey soils under best-practice regenerative management.
Derived by triangulating empirical targets for soil nitrogen supply and total nitrogen values calculated from soil organic carbon thresholds, reflecting a functionally healthy soil nitrogen status.
Sources (3)
(PDF) Influence of environmental conditions and some soil chemical properties on the carbon and nitrogen contents of some tropical Australian rainforest soils - ResearchGate
View SourceNitrogen Fixation in Acacias - AgEcon Search, accessed July 30, 2025,
View SourceSub tropical banana nutrition - Hort Innovation, accessed July 16, 2025,
View Source