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.
Evidence & Context
this report proposes an indicative aspirational optimal range for available K (Colwell K or equivalent extractable K) in Alpine Humus Soils (the dominant soil type) of 150 – 350 mg/kg.
available K (Colwell K or equivalent extractable K)
This benchmark represents an aspirational optimal range for available soil potassium in Alpine Humus Soils, aiming to support robust ecological function and resilience in this biome and land use context.
Inferred from natural alpine ecosystem K levels, ensuring levels are above deficiency for robust function and resilience, and below risk of major imbalance.
Sources (2)
openresearch-repository.anu.edu.au, accessed on May 31, 2025,
View SourcePhosphorus Nutrition of Proteaceae in Severely Phosphorus-Impoverished Soils: Are There Lessons To Be Learned for Future Crops? - PubMed Central
View SourceSupporting Sources (11)
Additional references from the underlying research that informed this benchmark.
2
Agriculture Victoria guidelines, Tasmania dairy pasture studies, Western Australia pasture studies
S14
S14, 2
S31
S32
S9
S9, S31, S32
Western Australia pasture studies