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.
Evidence & Context
A 1983 soil profile description by Pickard, cited in a 2005 study by Harris et al. on the floristics and structure of this unique forest, provides a direct, field-based measurement of soil pH within this high-integrity ecosystem. The study describes the soil as having an organic litter layer underlain by a plastic, clayey mineral soil. The measured soil pH within this profile was slightly acidic, ranging from pH 5.5 to 6.5.
Soil pH measured in water in a plastic, clayey mineral soil profile within a high-integrity mossy cloud forest ecosystem.
Soil pH measured in water in a plastic, clayey mineral soil profile within a high-integrity mossy cloud forest ecosystem on volcanic soils, representing a stable and resilient ecosystem.
The value is sourced from a peer-reviewed scientific publication that provides a quantitative measurement from a specific, described soil profile within a protected conservation area, a globally recognized exemplar of a high-health, high-endemism ecosystem.
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