Soil Potassium

AUS-TMS-FOR-SOK General Low confidence

Benchmark Value

No specific value — see range

Range: 60 to 120 mg/kg

Optimal Range: 60 to 120

Direction: Higher is desirable ↑

Form: OptimalRange

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

OptimalRange Primary MinimumOnly Guard

Evidence & Context

Optimal Range (for ecological health & sustainable production): 60 to 120 mg/kg.

Metric Definition:

available soil potassium

Benchmark Definition:

This benchmark represents the optimal range of available soil potassium for ecological health and sustainable production forestry in Tropical Monsoonal Savannas.

Justification:

Supports robust ecosystem function and tree health without promoting luxury consumption or major ecological disruption.

Sources (1)

Preview of Understanding soil tests for pastures | Soil | Farm management ..., accessed May 12, 2025

Understanding soil tests for pastures | Soil | Farm management ..., accessed May 12, 2025 Government

Agriculture Victoria. (2025). Understanding soil tests for pastures. Farm Management.

View Source

Supporting Sources (6)

Additional references from the underlying research that informed this benchmark.

Preview of (PDF) Soil potassium—crop response calibration relationships and criteria for field crops grown in Australia - ResearchGate, accessed July 18, 2025,

(PDF) Soil potassium—crop response calibration relationships and criteria for field crops grown in Australia - ResearchGate, accessed July 18, 2025,

Direct Evidence Journal

Nutrient Cycling in Australian Savannas on JSTOR - DOI

View Source

Preview of Leaf-level photosynthetic capacity dynamics in relation to soil and foliar nutrients along forest–savanna boundaries in Ghana and Brazil | Tree Physiology | Oxford Academic

Leaf-level photosynthetic capacity dynamics in relation to soil and foliar nutrients along forest–savanna boundaries in Ghana and Brazil | Tree Physiology | Oxford Academic

Contextual Support Journal

Leaf-level photosynthetic capacity dynamics in relation to soil and foliar nutrients along forest–savanna boundaries in Ghana and Brazil | Tree Physiology | Oxford Academic

View Source

Preview of Multiple soil element and pH interactions constrain plant performance on tropical soils with a long history of fire - CSIRO PUBLISHING | Soil Research, accessed May 16, 2025,

Multiple soil element and pH interactions constrain plant performance on tropical soils with a long history of fire - CSIRO PUBLISHING | Soil Research, accessed May 16, 2025,

Direct Evidence Journal

Soil Research - CSIRO PUBLISHING

View Source