scholarly journals Application of Electrical Resistivity Tomography for Detecting Root Biomass in Coffee Trees

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Carlos Mauricio Paglis
Keyword(s):  
Electrical Resistivity ◽  
Root Biomass ◽  
Electrical Resistivity Tomography ◽  
Mass Density ◽  
Plant Root ◽  
Soil Layer ◽  
Soil Resistivity ◽  
Resistivity Tomography ◽  
Coffee Plantations ◽  
Dipole Configuration

Roots play an important role in plants and are responsible for several functions; among them are anchorage and nutrient and water absorption. Several methodologies are being tested and used to study plant root systems in order to avoid destructive root sampling. Electrical resistivity tomography is among these methodologies. The aim of this preliminary study was to use electrical resistivity for detecting root biomass in coffee trees. Measurements were performed in a soil transect with an ABM AL 48-b resistivimeter with a pole-dipole configuration. The tomograms indicated variability in soil resistivity values ranging from 120 to 1400 Ω·m−1. At the first 0.30 cm soil layer, these values were between 267 and 952 Ω·m−1. Oriented by this result, root samples were taken at 0.10, 0.20, and 0.30 m depths within 0.50 m intervals along the soil transect to compare soil resistivity with root mass density (RMD). RMD data, up to this depth, varied from 0.000019 to 0.009469 Mg·m−3, showing high spatial variability and significant relationship to the observed values of soil resistivity. These preliminary results showed that the electrical resistivity tomography can contribute to root biomass studies in coffee plants; however, more experiments are necessary to confirm the found results in Brazil coffee plantations.

scholarly journals Small-scale characterization of vine plant root water uptake via 3-D electrical resistivity tomography and mise-à-la-masse method

2018 ◽  
Vol 22 (10) ◽  
pp. 5427-5444 ◽  
Author(s):  
Benjamin Mary ◽  
Luca Peruzzo ◽  
Jacopo Boaga ◽  
Myriam Schmutz ◽  
Yuxin Wu ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Root System ◽  
Field Data ◽  
Electrical Resistivity Tomography ◽  
Root Zone ◽  
Plant Root ◽  
Root Water Uptake ◽  
Small Scale ◽  
Noninvasive Methods ◽  
Resistivity Tomography

Abstract. The investigation of plant roots is inherently difficult and often neglected. Being out of sight, roots are often out of mind. Nevertheless, roots play a key role in the exchange of mass and energy between soil and the atmosphere, in addition to the many practical applications in agriculture. In this paper, we propose a method for roots imaging based on the joint use of two electrical noninvasive methods: electrical resistivity tomography (ERT) and mise-à-la-masse (MALM). The approach is based on the key assumption that the plant root system acts as an electrically conductive body, so that injecting electrical current into the plant stem will ultimately result in the injection of current into the subsoil through the root system, and particularly through the root terminations via hair roots. Evidence from field data, showing that voltage distribution is very different whether current is injected into the tree stem or in the ground, strongly supports this hypothesis. The proposed procedure involves a stepwise inversion of both ERT and MALM data that ultimately leads to the identification of electrical resistivity (ER) distribution and of the current injection root distribution in the three-dimensional soil space. This, in turn, is a proxy to the active (hair) root density in the ground. We tested the proposed procedure on synthetic data and, more importantly, on field data collected in a vineyard, where the estimated depth of the root zone proved to be in agreement with literature on similar crops. The proposed noninvasive approach is a step forward towards a better quantification of root structure and functioning.

scholarly journals Stabilization Methodology in Foundation Soils by ERT-3D Application in Estepona, South Spain

2021 ◽  
Vol 11 (10) ◽  
pp. 4455
Author(s):  
Alfonso Gutiérrez-Martín ◽  
José I. Yenes ◽  
Marta Fernández-Hernández ◽  
Ricardo Castedo
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Shallow Foundations ◽  
Simplified Model ◽  
High Resistivity ◽  
Combined System ◽  
Resistivity Tomography ◽  
Field Campaign ◽  
Non Invasive ◽  
Dipole Configuration

The paper proposes a novel methodology for the stabilization of shallow foundations, with a simplified model combined with 3D electrical resistivity tomography (ERT-3D and consolidation injections. To determine its usefulness, the method has been applied in a case located in Estepona (southern Spain). The chosen tomography model is the dipole–dipole configuration, with an optimized distance between electrodes of 0.80 m for a better visualization of the foundation subsoil; with this parameterization, a total of 72 electrodes were installed in the analyzed case. In this work, the depth of the anomaly in the building’s supporting subsoil was detected ranging from 2.00 m to 3.90 m deep. The study also delineates areas of high resistivity variations (50–1000 Ω m) in the middle and eastern end of the field. These data have been validated and corroborated with a field campaign. The results of the ERT-3D monitoring are presented, once the investment data has been processed with the RES3DINV software, from the beginning to the end of the stabilization intervention. The novelty occurs with the interaction between the tomography and the foundation consolidation injections, until the final stabilization. This is a very useful methodology in case of emergency consolidation, where there is a need to minimize damage to the building. Thus, people using this combined system will be able to practically solve the initial anomalies of the subsoil that caused the damages, in a non-invasive way, considerably lowering the value of the resistivities.

scholarly journals Small scale characterization of vine plant root water uptake via 3D electrical resistivity tomography and Mise-à-la-Masse method

2018 ◽  
Author(s):  
Benjamin Mary ◽  
Luca Peruzzo ◽  
Jacopo Boaga ◽  
Myriam Schmutz ◽  
Yuxin Wu ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Root System ◽  
Field Data ◽  
Electrical Resistivity Tomography ◽  
Root Zone ◽  
Plant Root ◽  
Small Scale ◽  
Resistivity Tomography ◽  
Invasive Approach ◽  
Non Invasive

Abstract. The investigation of plant roots is inherently difficult and often neglected. Being out of sight, roots are often out of mind. Still, roots play a key role in the exchange of mass and energy between soil and the atmosphere, let alone the many practical applications in agriculture. In this paper, we propose a method for roots imaging based on the joint use of two electrical non-invasive methods, Electrical Resistivity Tomography (ERT) and Mise-a-la-Masse (MALM). The approach is based on the key assumption that the plant root system acts as an electrically conductive body, so that injecting electrical current in the plant stem will ultimately result in the injection of current in the subsoil through the root system, and particularly through the root terminations via hair roots. Evidence from field data, showing that voltage distribution is very different whether current is injected in the tree stem or in the ground, strongly supports this hypothesis. The proposed procedure involves a stepwise inversion of both ERT and MALM data that ultimately leads to the identification of electrical resistivity distribution, and of the current-injection root distribution in the three-dimensional soil space. This, in turn, is a proxy to the active (hair) root density in the ground. We tested the proposed procedure on synthetic data and, more importantly, on field data collected in vineyard, where the estimated depth of the root zone proved to be in agreement with literature on similar crops. The proposed non-invasive approach is a step forward towards a better quantification of roots structure and functioning.

scholarly journals Stabilization methodology in foundation soils by ERT-3D. Application in Estepona, South Spain.

2021 ◽  
Author(s):  
Alfonso Gutiérrez-Martín ◽  
José I. Yenes ◽  
Marta Fernández-Hernández ◽  
Ricardo Castedo
Keyword(s):  
Electrical Resistivity ◽  
Electrical Resistivity Tomography ◽  
Shallow Foundations ◽  
Simplified Model ◽  
High Resistivity ◽  
Combined System ◽  
Resistivity Tomography ◽  
Field Campaign ◽  
Non Invasive ◽  
Dipole Configuration

The paper proposes a novel methodology for the stabilization of shallow foundations, with a simplified model combined with 3D Electrical resistivity tomography (ERT-3D) and conso- lidation injections. To determine its usefulness, the method has been applied in a case located in Estepona (southern Spain). The chosen tomography model is the dipole-dipole configuration, with an optimized distance between electrodes of 0.80 m for a better visualization of the foundation subsoil; with this parameterization, a total of 72 electrodes were installed in the analyzed case. In this work, the depth of the anomaly in the building's supporting subsoil was detected ranging from 2.00 m to 3.90 m deep. The study also delineates areas of high resistivity variations (50-1,000 Ω m) in the middle and eastern end of the field. These data have been validated and corroborated with a field campaign. The results of the ERT-3D monitoring are presented, once the investment data has been processed with the RES3DINV software, from the beginning to the end of the stabilization intervention. The novelty occurs with the interaction between the tomography and the foundation consolidation injections, until the final stabilization; very useful methodology in case of emergency consolidation, where there is a need to minimize damage to the building. Thus, people using this combined system; will be able to practically solve the initial anomalies of the subsoil that caused the damages, in a non-invasive way, considerably lowering the value of the resistivities.

Electrical resistivity tomography as a non-destructive method for mapping root biomass in an orchard

2010 ◽  
Vol 62 (2) ◽  
pp. 206-215 ◽  
Author(s):  
R. Rossi ◽  
M. Amato ◽  
G. Bitella ◽  
R. Bochicchio ◽  
J. J. Ferreira Gomes ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Root Biomass ◽  
Electrical Resistivity Tomography ◽  
Resistivity Tomography ◽  
Non Destructive
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