Soil Structure & Compaction

AUS-ASC-AGR-SSC General Moderate confidence

Benchmark Value

2000 kPa

Thresholds: Lower: —, Upper: 2000

Direction: Lower is desirable ↓

Form: MaximumOnly

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

Based on this evidence, a lower critical threshold (i.e., an upper limit for acceptable penetrometer resistance) of >2000 kPa is proposed for agricultural crop production in the alpine and subalpine context.

Metric Definition:

Penetrometer resistance measured as the force required to push a standardized cone through the soil profile, expressed in kilopascals (kPa).

Benchmark Definition:

Upper limit of penetrometer resistance beyond which soil ecological functions and crop productivity are significantly compromised in alpine and subalpine agricultural crop production.

Justification:

Threshold based on consistent findings across agricultural studies indicating significant root impediment and functional decline at resistances exceeding 2000-2500 kPa.