Soil Structure & Compaction
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 10 benchmarks together — the OptimalRange form drives the primary score, while 9 guard(s) constrain the result.
Evidence & Context
A penetrometer resistance of > 2,500 kPa (2.5 MPa) indicates a state of severe degradation. At this point, root growth is largely restricted to pre-existing cracks and biopores, and the plant's ability to explore the soil volume for water and nutrients is critically compromised.
Penetrometer resistance threshold indicating severe soil compaction and critical impairment of root growth.
This benchmark represents the upper detrimental threshold of soil penetrometer resistance in temperate semi-arid shrublands and open woodlands under conservation, beyond which severe degradation and critical root growth impairment occur.
Based on literature indicating severe root growth restriction and ecosystem function impairment above this PR value.
Sources (1)
high soil strength - fact sheet - Grains Research and Development Corporation (GRDC)
View SourceSupporting Sources (1)
Additional references from the underlying research that informed this benchmark.
Great Western Woodlands Soil Characteristic Data 2012 - 2014
View Source