Details
| Original language | English |
|---|---|
| Title of host publication | Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009 |
| Pages | 439-444 |
| Number of pages | 6 |
| Publication status | Published - 2009 |
| Event | 7th European Conference on Precision Agriculture, ECPA 2009 - Wageningen, Netherlands Duration: 6 Jul 2009 → 8 Jul 2009 |
Publication series
| Name | Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009 |
|---|
Abstract
To date an easy access to regionalise subsoil compaction on the field scale has not been realised with the common soil physical methods. Caused by their own methodical limitation, results can only be produced in the laboratory but with significance limited to the probed soil pit and therefore presenting only a local state of mechanical strength. Existing field methods to access this problem allow simple punctual measurements but are not adequate for a larger spatial resolution. Non-destructive probes, on the other hand, provide a better spatial resolution but in general do not show directly the state of mechanical stress. A solution for this problem could to approach the state of mechanical strength focusing on the stress-at-rest-coefficient, K0, in combination with various independently measured geophysical values like the apparent electrical conductivity (ECa), the electrical resistivity (ER) and the electromagnetic radiation (EMR). Results from two experimental sites located in the loess belt of Northern Germany showed that all geophysical sensors respond to the higher bulk density and soil water content in the areas of the headland, wheel tracks, and experimental traffic induced overcompaction with higher electrical conductivity or a change in the reflection. A direct correlation to the depth-specific Penetrologger results and the aligned change of the soil stress situation was only possible with the Ground penetrating radar (GPR) and the new soil sensor system 'Geophilus electricus'. This leads us to the conclusion that the used geophysical based techniques can be used as a pre-screening tool for the detection of the spatial distribution of the subsoil mechanical strength at least in loess-derived soils.
Keywords
- Penetration resistance, Pre-screening, Soil sensing system, Soil stress situation, Subsoil compaction
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
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Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009. 2009. p. 439-444 (Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - The capability of non-destructive geophysical methods in precision agriculture to capture subsoil mechanical strength
AU - Hoefer, G.
AU - Lück, E.
AU - Gundelach, V.
AU - Rühlmann, J.
AU - Bachmann, J.
N1 - Copyright: Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2009
Y1 - 2009
N2 - To date an easy access to regionalise subsoil compaction on the field scale has not been realised with the common soil physical methods. Caused by their own methodical limitation, results can only be produced in the laboratory but with significance limited to the probed soil pit and therefore presenting only a local state of mechanical strength. Existing field methods to access this problem allow simple punctual measurements but are not adequate for a larger spatial resolution. Non-destructive probes, on the other hand, provide a better spatial resolution but in general do not show directly the state of mechanical stress. A solution for this problem could to approach the state of mechanical strength focusing on the stress-at-rest-coefficient, K0, in combination with various independently measured geophysical values like the apparent electrical conductivity (ECa), the electrical resistivity (ER) and the electromagnetic radiation (EMR). Results from two experimental sites located in the loess belt of Northern Germany showed that all geophysical sensors respond to the higher bulk density and soil water content in the areas of the headland, wheel tracks, and experimental traffic induced overcompaction with higher electrical conductivity or a change in the reflection. A direct correlation to the depth-specific Penetrologger results and the aligned change of the soil stress situation was only possible with the Ground penetrating radar (GPR) and the new soil sensor system 'Geophilus electricus'. This leads us to the conclusion that the used geophysical based techniques can be used as a pre-screening tool for the detection of the spatial distribution of the subsoil mechanical strength at least in loess-derived soils.
AB - To date an easy access to regionalise subsoil compaction on the field scale has not been realised with the common soil physical methods. Caused by their own methodical limitation, results can only be produced in the laboratory but with significance limited to the probed soil pit and therefore presenting only a local state of mechanical strength. Existing field methods to access this problem allow simple punctual measurements but are not adequate for a larger spatial resolution. Non-destructive probes, on the other hand, provide a better spatial resolution but in general do not show directly the state of mechanical stress. A solution for this problem could to approach the state of mechanical strength focusing on the stress-at-rest-coefficient, K0, in combination with various independently measured geophysical values like the apparent electrical conductivity (ECa), the electrical resistivity (ER) and the electromagnetic radiation (EMR). Results from two experimental sites located in the loess belt of Northern Germany showed that all geophysical sensors respond to the higher bulk density and soil water content in the areas of the headland, wheel tracks, and experimental traffic induced overcompaction with higher electrical conductivity or a change in the reflection. A direct correlation to the depth-specific Penetrologger results and the aligned change of the soil stress situation was only possible with the Ground penetrating radar (GPR) and the new soil sensor system 'Geophilus electricus'. This leads us to the conclusion that the used geophysical based techniques can be used as a pre-screening tool for the detection of the spatial distribution of the subsoil mechanical strength at least in loess-derived soils.
KW - Penetration resistance
KW - Pre-screening
KW - Soil sensing system
KW - Soil stress situation
KW - Subsoil compaction
UR - http://www.scopus.com/inward/record.url?scp=84893352161&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84893352161
SN - 9789086861132
T3 - Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009
SP - 439
EP - 444
BT - Precision Agriculture 2009 - Papers Presented at the 7th European Conference on Precision Agriculture, ECPA 2009
T2 - 7th European Conference on Precision Agriculture, ECPA 2009
Y2 - 6 July 2009 through 8 July 2009
ER -