Soil pH
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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.
Evidence & Context
A pH (water) value below 5.5 is considered a critical threshold for general ecosystem health in this context, below which nutrient availability is significantly impaired and the risk of aluminum toxicity increases for non-specialist native flora.
Soil pH (water) value below which ecosystem function is impaired due to nutrient availability decline and increased aluminum toxicity risk.
Soil pH (water) value below which ecosystem function is impaired, marking a critical threshold for nutrient availability and aluminum toxicity risk.
Based on broad-scale soil science literature and ecosystem-specific data, including Australian agricultural studies.
Sources (1)
Norfolk Island Pine Production Guide
View SourceSupporting Sources (3)
Additional references from the underlying research that informed this benchmark.
Norfolk Island Region Threatened Species Recovery Plan
View Source
Norfolk Island Region Threatened Species Recovery Plan
Norfolk Island Region Threatened Species Recovery Plan