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
A soil available phosphorus level below 5 mg/kg is considered critically low for maintaining the essential functions and long-term productivity of a sustainable production forestry system in this biome.
Available soil phosphorus level below which forest productivity and ecological function are significantly compromised.
Represents a state of clear nutrient deficiency where long-term productivity and site health are compromised in temperate grassy woodlands production forestry.
Based on controlled experiments showing significant growth limitation in Eucalyptus species at available P levels of approximately 4.5 mg/kg.
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