Soil Potassium

Benchmark Value

1.5 ratio

Thresholds: Lower: 1.5, Upper: —

Direction: Higher is desirable ↑

Form: LowerThreshold

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 6 benchmarks together — the OptimalRange form drives the primary score, while 5 guard(s) constrain the result.

Contributing Benchmarks

OptimalRange Primary MaximumOnly Guard LowerThreshold Guard Point Guard MinimumOnly Guard MaximumOnly Guard

Evidence & Context

A Magnesium to Potassium (Mg:K) ratio of less than 1.5:1 in herbage (and reflecting soil conditions) is often cited as an indicator of increased risk for grass tetany.

Metric Definition:

Magnesium to Potassium (Mg:K) ratio in herbage

Benchmark Definition:

This benchmark represents the lower critical threshold of the Magnesium to Potassium (Mg:K) ratio in herbage, below which there is an increased risk of grass tetany under livestock grazing and pasture in temperate dry woodlands and native grasslands in Australia.

Justification:

A ratio below this threshold indicates increased risk of animal health issues related to potassium imbalance.