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 3 benchmarks together — the OptimalRange form drives the primary score, while 2 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
An available soil phosphorus level exceeding 20 mg/kg is considered detrimental to the environmental health and overall ecosystem function of a production forest in this biome.
Available soil phosphorus level above which ecological degradation and physiological stress occur.
Represents a state of ecological degradation and/or physiological stress in temperate grassy woodlands production forestry.
Levels above this threshold are associated with direct P toxicity in non-mycorrhizal Eucalyptus species and a systemic shift in the understorey from native-dominated to exotic weed-dominated.
Sources (1)
Establishment of critical nutrient levels in soil and plant for eucalyptus
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
Australian dryland soils are acidic and nutrient-depleted, and have unique microbial communities compared with other drylands - PMC
View SourcePhosphorus uptake and toxicity are delimited by mycorrhizal symbiosis in P-sensitive Eucalyptus marginata but not in P-tolerant Acacia celastrifolia - PubMed Central
View Source