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 2 benchmarks together — the OptimalRange form drives the primary score, while 1 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
Proposed Indicative Reference Range for Colwell P (0-10 cm, for soils with low PBI, e.g., <100): 2 - 8 mg/kg
Available Phosphorus (Colwell P) in topsoil (0-10 cm)
This benchmark represents the indicative natural range of available phosphorus in topsoil with low phosphorus buffering capacity in Tropical Monsoonal Savannas under production forestry.
Estimation based on extreme P-limitation in these systems and data from low-input or unfertilized areas.
Sources (47)
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View SourceSoil phosphorus—crop response calibration relationships and criteria for oilseeds, grain legumes and summer cereal crops grown in Australia - ResearchGate
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View SourceBiome-specific effects of nitrogen and phosphorus on the photosynthetic characteristics of trees at a forest-savanna boundary in Cameroon - PMC - PubMed Central
View SourceSoil and Landscape Grid National Soil Attribute Maps - Available Phosphorus (3" resolution) - Release 1
View SourceDelta15N values of tropical savanna and monsoon forest species reflect root specialisations and soil nitrogen status - PubMed
View SourceCritical phosphorus values from the Better Fertiliser Decisions for Pastures project: early insights from validation trials - CSIRO Publishing
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View SourceEffects of nitrogen and phosphorus availability on the early growth of two congeneric pairs of savanna and forest species - SciELO
View SourceGlobal patterns and drivers of soil total phosphorus concentration - ESSD Copernicus
View SourceIdentifying limitations for invasion: the effect of phosphorus availability on the growth of the non-native tree, Tipuana tipu - CSIRO Publishing
View SourceImpact of phosphorus fertiliser on tropical pasture legume production
View SourceIdentifying limitations for invasion: the effect of phosphorus availability on the growth of the non-native tree, Tipuana tipu - CSIRO Publishing
View SourceBudgeting phosphorus in medium and lower rainfall zones of southern NSW
View SourceInterpreting soil tests in the light of P, K and S research - Inside Cotton
View SourceSoil pH predominantly controls the forms of organic phosphorus in topsoils under natural broadleaved forests along a 2500 km latitudinal gradient - ResearchGate
View SourceNegative effects of nitrogen override positive effects of phosphorus on grassland legumes worldwide | PNAS, accessed August 4, 2025,
View SourceExtractable Phosphorus | Soil Testing Laboratory
View SourceParadox explained - Smithsonian Tropical Research Institute
View SourcePhosphorus management of beef cattle in northern Australia
View SourcePhosphorus management of beef cattle in northern Australia - MLA
View SourcePhosphorus map of Queensland - Dataset - Publications ...
View SourcePhosphorus nutrition of phosphorus-sensitive Australian native plants: threats to plant communities in a global biodiversity hotspot - PMC
View SourceNitrogen and Phosphorus Retranslocation of Leaves and Stemwood in a Mature Eucalyptus Forest Exposed to 5 Years of Elevated CO2 - Frontiers
View SourceProjected changes in distributions of Australian tropical savanna birds under climate change using three different dispersal scenarios - PubMed Central
View SourceRecent insights in soil nutrient cycling: perspectives from Pinus and Eucalyptus forest studies around the world
View SourceSavanna - Grassland, Climate, Animals | Britannica
View SourceSLGA: Soil and Landscape Grid of Australia (Soil Attributes) | Earth Engine Data Catalog
View SourceSoil and Landscape Grid National Soil Attribute Maps - Total Phosphorus (3" resolution) - Release 1 - CSIRO Data Access Portal
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View SourceSoil Test Interpretation - Holbrook Landcare Network
View SourceTERN Australian SuperSite Network - Research Data Australia
View SourceThe Global Dilemma of Soil Legacy Phosphorus and Its Improvement Strategies under Recent Changes in Agro-Ecosystem Sustainability
View SourceThe Soil and Landscape Grid of Australia - YouTube
View SourceA new detailed map of total phosphorus stocks in Australian soil
View SourceUnderstanding Soil Phosphorus - ResearchGate
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View SourceUpdate and expansion of the soil and landscape grid of Australia - ResearchGate
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