Soil Structure & Compaction

AUS-TMI-AGR-SSC General Moderate confidence

Benchmark Value

2000 kPa

Thresholds: Lower: 2000, Upper: —

Direction: Lower 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 17 benchmarks together — the OptimalRange form drives the primary score, while 16 guard(s) constrain the result.

Contributing Benchmarks

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

Evidence & Context

Scientific literature consistently indicates that penetrometer resistance values exceeding 2,000 kPa significantly impede root growth for most crops, representing a critical threshold for ecological and agricultural function.

Metric Definition:

Penetrometer resistance threshold above which root growth is significantly impeded

Benchmark Definition:

This benchmark represents the critical penetrometer resistance threshold above which root growth is significantly restricted in agricultural crop production soils in the Tropical & Subtropical Maritime Islands biome of Australia.

Justification:

Widely accepted conservative threshold from scientific literature.