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 14 benchmarks together — the OptimalRange form drives the primary score, while 13 guard(s) constrain the result.
Evidence & Context
Based on the consensus in the scientific literature, the threshold at which soil compaction begins to significantly compromise the ecological function of arid cropping systems is 1500 kPa.
The most direct and widely used method for quantifying soil compaction in the field is with a cone penetrometer. This instrument measures the force required to push a standardized cone tip through the soil profile, providing a reading of soil strength or mechanical impedance.
This benchmark marks the soil compaction level at which root growth and ecological function in arid cropping systems begin to be significantly impaired.
Above this level of mechanical impedance, the soil's ability to support vigorous root growth, efficiently capture and store water, and maintain its structural integrity becomes demonstrably impaired.
Sources (1)
Soil Health Assessment Part IV: Soil Penetration Resistance and ..., accessed August 2, 2025
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