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Research article - Peer-reviewed, 2021

Seismic signatures reveal persistence of soil compaction

Romero-Ruiz, Alejandro; Linde, Niklas; Baron, Ludovic; Solazzi, Santiago Gabriel; Keller, Thomas; Or, Dani

Abstract

A well-developed soil structure is a key attribute of a productive and functioning soil. Evidence shows that subtle changes in the spatial arrangement and binding of soil constituents impart large changes in soil mechanical and hydraulic properties and associated ecological services. However, these features remain difficult to quantify at spatial scales relevant for agricultural management. In this work, we propose a pedophysical model to interpret macroscopic seismic properties in terms of soil structure. The model captures subtle soil mechanical traits accounting for soil plastic deformation due to compaction. In order to evaluate the model, we use data from field monitoring at an experimental site that revealed elevated seismic velocities in plots that were compacted 5 yr prior to our measurements. Our results show that P-wave velocities carry a strong imprint of soil compaction and are well predicted by the proposed model. The model infers contact areas between aggregates that are nearly threefold larger for compacted than for non-compacted soils, indicating that soils have not recovered from compaction. The study illustrates the potential of seismic methods to identify chronic compaction at field scale.

Published in

Vadose Zone Journal
2021, volume: 20, number: 4, article number: e20140
Publisher: WILEY

Authors' information

Romero-Ruiz, Alejandro
University of Lausanne
Linde, Niklas
University of Lausanne
Baron, Ludovic
University of Lausanne
Solazzi, Santiago Gabriel
University of Lausanne
Swedish University of Agricultural Sciences, Department of Soil and Environment
Agroscope
Or, Dani
ETH Zurich
Or, Dani
Desert Research Institute

UKÄ Subject classification

Soil Science

Publication Identifiers

DOI: https://doi.org/10.1002/vzj2.20140

URI (permanent link to this page)

https://res.slu.se/id/publ/113015