The application of proximal visible and near-infrared spectroscopy to estimate soil organic matter on the Triffa Plain of Morocco

作     者：Ayoub Lazaar Abdul Mounem Mouazen Kamal EL Hammouti Michael Fullen Biswajeet Pradhan Muhammad Sohail Memon Karim Andich Abdelilah Monir Ayoub Lazaar;Abdul Mounem Mouazen;Kamal EL Hammouti;Michael Fullen;Biswajeet Pradhan;Muhammad Sohail Memon;Karim Andich;Abdelilah Monir

作者机构：Laboratory of Applied GeosciencesDepartment of GeologyFaculty of ScienceMohammed First UniversityOujdaMorocco Division of MechatronicsBiostatistics and Sensors(MeBioS)Faculty of Bioscience EngineeringKasteelpark Arenberg 30B-3001 HeverleeBelgium Faculty of Science and EngineeringUniversity of WolverhamptonWolverhamptonWV11LYUnited Kingdom Center for Advanced Modelling and Geospatial Information Systems(CAMGIS)Faculty of Engineering and Information TechnologyUniversity of Technology SydneySydney2007NSWAustralia Faculty of Agricultural EngineeringSindh Agriculture UniversityTandojam70060Pakistan Laboratory of Applied Geomatics and Soil ScienceNational Institute of Agronomic Research(INRA)OujdaMorocco Department of MathematicsEDP and Scientific Computing TeamMoulay Ismail UniversityMéknesMorocco 

出 版 物：《International Soil and Water Conservation Research》 (国际水土保持研究（英文）)

年 卷 期：2020年第8卷第2期

页      面：195-204页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：The authors acknowledge the facilities and financial supports provided by the Mohammed First University and the National Institute of Agronomic Research(INRA)of Oujda.I want to thank all researchers of the Applied Geosciences Laboratory and all re-searchers of INRA for his help in collecting the soil samples and their analysis in the laboratory 

主　　题：Soil organic matter VIS-NIR spectroscopy Reflectance spectra SOM estimation SOM analysis 

摘      要：Soil organic matter (SOM) is a fundamental soil constituent. The estimation of this parameter in the laboratory using the classical method is complex time-consuming and requires the use of chemical re-agents. The objectives of this study were to assess the accuracy of two laboratory measurement setups of the VIS-NIR spectroscopy in estimating SOM content and determine the important spectral bands in the SOM estimation model. A total of 115 soil samples were collected from the non-root zone (0-20 cm) of soil in the study area of the Triffa Plain and then analysed for SOM in the laboratory by the Walkley-Black method. The reflectance spectra of soil samples were measured by two protocols, Contact Probe (CP) and Pistol Grip (PG)) of the ASD spectroradiometer (350-2500 nm) in the laboratory. Partial least squares regression (PLSR) was used to develop the prediction models. The results of coefficient of determination (R2) and the root mean square error (RMSE) showed that the pistol grip offers reasonable accuracy with an R2=0.93 and RMSE=0.13 compared to the contact probe protocol with an R2=0.85 and RMSE = 0.19. The near-Infrared range were more accurate than those in the visible range for pre-dicting SOM using the both setups (CP and PG). The significant wavelengths contributing to the pre-diction of SOM for (PG) setup were at:424, 597, 1432, 1484, 1830,1920, 2200, 2357 and 2430 nm, while were at 433, 587, 1380, 1431, 1929, 2200 and 2345 nm for (CP) setup.