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. The scoring engine uses 7 benchmarks together — the OptimalRange form drives the primary score, while 6 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
Lower Critical Threshold: Evidence suggests a threshold near 500 mg/kg TN (corresponding to <0.5% SOC), below which soil ecosystem functions like nutrient cycling are severely compromised, and crop response to inputs is poor.
Total nitrogen concentration in soil below which soil ecosystem functions are severely compromised.
This benchmark represents the minimum total nitrogen concentration in soil below which soil ecosystem functions are severely impaired, indicating poor soil health and reduced crop response.
Based on evidence linking SOC below 0.5% and corresponding TN to severe functional degradation and poor crop response.
Sources (1)
(PDF) Influence of environmental conditions and some soil chemical properties on the carbon and nitrogen contents of some tropical Australian rainforest soils - ResearchGate
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
Sub tropical banana nutrition - Hort Innovation, accessed July 16, 2025,
View Source