Soil Phosphorus
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
Upper Detrimental Threshold: >70 mg/kg is considered high and indicative of a degraded state. This excess poses a significant risk of nutrient leaching and runoff into sensitive marine ecosystems once the soil's high P-sorption capacity is saturated.
Available soil phosphorus level above which ecological degradation and environmental risk occur.
Maximum available phosphorus level to avoid ecological degradation and pollution risk.
Based on the finite P-sorption capacity of volcanic Ferrosol soils and documented environmental impacts of excess phosphorus.
Sources (1)
VEGETATION 0}' LORD HOWE ISLAND - Botanic Gardens of Sydney
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
NORFOLK ISLAND FOOD SECURITY STRATEGY 2023 - 2028 “Growing the local food economy for a resilient, sustainable and healthy com
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