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 in Tropical Monsoonal Savannas under production forestry, supporting ecosystem health and sustainable tree growth.

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.

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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