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 5 benchmarks together — the OptimalRange form drives the primary score, while 4 guard(s) constrain the result.
Contributing Benchmarks
Evidence & Context
The primary concerns with excessively high K levels (potentially >150-200 mg/kg without commensurate benefits) relate to induced nutrient imbalances (especially with magnesium and calcium) and economic inefficiency.
Upper detrimental threshold for exchangeable potassium in the 0-10 cm soil depth
Threshold above which excessive potassium may cause nutrient imbalances and economic inefficiency.
Based on risk of cation imbalances in low CEC soils and economic considerations.
Sources (1)
Fertilisation with P, N and S requires additional Zn for healthy plantation tree growth on low fertility savanna soils - ResearchGate
View SourceSupporting Sources (2)
Additional references from the underlying research that informed this benchmark.
Soil Survey of the Kurnturlpara Area, Warumungu Aboriginal Land Trust
View SourceSoil Research - CSIRO PUBLISHING
View Source