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Improving soil organic carbon (SOC) prediction by field spectrometry in bare cropland by reducing the disturbing effect of soil roughness
Denis, Antoine; Tychon, Bernard; Stevens, Antoine et al.
2009In Geoscience and Remote Sensing Symposium, 2009 IEEE International, IGARSS 2009
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Keywords :
infrared; spectroscopy; soil; carbon; roughness
Abstract :
[en] The spatial estimation of Soil Organic Carbon (SOC) at large scale in outdoor condition is an important issue. It has been largely demonstrated that diffuse reflectance spectroscopic techniques, are efficient for SOC determination in field conditions. However these methods are influenced by disturbing factors such as soil water content, vegetation residues and surface roughness, the later being the object of this study. Our laboratory experiments showed that the accuracy of SOC prediction from shadowed soil samples with spectroscopy techniques decreases with increasing soil shadow. In this study a new methodology using a digital camera for identifying and correcting the effect of soil shadow on field reflectance spectra measured with an Analytical Spectral Devices (ASD) during field campaign in bare crop lands has been elaborated and tested. Results showed that the proposed shadow correction method enables improving significantly SOC prediction accuracy and performs better than traditionally used methods consisting in automatic signal processing.
Disciplines :
Aerospace & aeronautics engineering
Agriculture & agronomy
Earth sciences & physical geography
Author, co-author :
Denis, Antoine  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Département des sciences et gestion de l'environnement
Tychon, Bernard ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Département des sciences et gestion de l'environnement
Stevens, Antoine;  Université Catholique de Louvain - UCL > Department of Geography
Van Wesemael, Bas;  Université Catholique de Louvain - UCL > Department of Geography
Language :
English
Title :
Improving soil organic carbon (SOC) prediction by field spectrometry in bare cropland by reducing the disturbing effect of soil roughness
Alternative titles :
[fr] Amélioration de la prédiction du carbone organique du sol par spectrométrie de terrain dans des terres agricoles nues par réduction de l'effet de la rugosité du sol
Publication date :
17 July 2009
Event name :
2009 IEEE International Geoscience & Remote Sensing Symposium
Event organizer :
2009 IEEE International Geoscience & Remote Sensing Symposium
Event place :
Cape Town, South Africa
Event date :
du 13 juillet 2009 au 17 juillet 2009
Audience :
International
Main work title :
Geoscience and Remote Sensing Symposium, 2009 IEEE International, IGARSS 2009
Publisher :
IEEE
ISBN/EAN :
978-1-4244-3395-7
Peer reviewed :
Peer reviewed
Name of the research project :
Monitoring soil Organic CArbon in croplands using Imaging Spectroscopy (MOCA)
Available on ORBi :
since 17 December 2009

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