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This article in SSSAJ

  1. Vol. 44 No. 3, p. 601-606
     
    Received: Sept 24, 1979
    Published: May, 1980


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doi:10.2136/sssaj1980.03615995004400030034x

The Penetration Resistance in a Soil with Well-defined Structural Units1

  1. J. M Bradford2

Abstract

Abstract

Based on both laboratory and in situ probe penetration tests within each horizon of a soil with well-defined structural units, the magnitude and variability of probe resistance values in relation to probe diameter and structural features are presented. Total penetration resistance was equal for 0.376- and 0.514 cm-diam 60° angle probes; however, the resistance standard deviation and coefficient of variation were larger for the smaller probe. A pocket penetrometer gave significantly larger penetration resistances. There was a close relationship between probe penetration resistance of a 0.376-cm-diam probe and root length in natural B3 horizon.

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