Soil Potassium
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 benchmark of 80 mg/kg (Colwell K) has been derived with Moderate confidence. This value was determined by synthesizing multiple lines of evidence: using agronomic critical values to establish a functional floor, referencing national soil models to estimate a natural baseline, and applying ecological principles relevant to these unique, low-nutrient, arid ecosystems.
Available soil potassium (Colwell K) concentration representing a state of high environmental health in the Arid Karstic Woodlands & Shrublands biome under conservation land use.
A scientifically-informed estimate of available soil potassium concentration representing high environmental health in the target biome.
Derived through synthesis of agronomic critical values, national soil models, and ecological principles due to lack of direct empirical data.
Sources (1)
"Soil potassium-crop response calibration relationships and criteria for field crops grown in Australia"
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
(PDF) Mineral Nutrition of Plants in Australia's Arid Zone - ResearchGate
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Agronomic and ecological studies on potassium excess effects
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