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BookletA course on applied data analytics for soil analysis with infrared spectroscopy
Soil spectroscopy training manual 2
2025Also available in:
No results found.This document provides a comprehensive guide to the process of soil spectroscopic modelling, from data acquisition to interpretation, with a focus on using R for analytical modelling. It covers the entire workflow involved in generating reliable predictions of soil properties from spectral data, including data preprocessing, exploratory analysis, calibration, model training, and validation. Practical examples in R are provided throughout, illustrating key steps such as spectral transformation, principal component (PC) analysis, and multivariate regression techniques for predictive modelling. These steps help convert raw spectral data into actionable insights, allowing users to estimate soil attributes like organic carbon (C), clay content, and mineral composition. The document introduces well-known mathematical transfer functions, which correlate spectral wavelengths to soil properties, and how these models can be calibrated using conventional laboratory analysed reference data. Additionally, it explores the challenges of interpreting complex infrared spectra, especially the overlapping absorption bands in the vis-NIR region, and provides strategies to overcome these difficulties. It emphasizes the use of chemometric tools, such as partial least squares (PLS) regression, to extract meaningful relationships between spectral features and soil attributes. This document is the second in a series of three training materials designed to guide users through basic, intermediate, and advanced topics in soil vis-NIR and MIR spectroscopy. The content is aimed at equipping researchers, practitioners and soil laboratory technicians with the knowledge and tools needed to apply spectroscopic techniques for soil analysis, with a focus on practical implementation using R. -
BookletGlobal Soil Spectroscopy Assessment
Spectral soil data – Needs and capacities
2021Also available in:
No results found.The publication reports the information collected in the survey on the capabilities and needs of soil laboratories for collecting and managing soil spectral data. The text provides an overview of the current expertise, capabilities, needs and priority areas for labs that want to start or improve their spectral measurements and modelling, both for MIR and VNIR regions. -
BookletUne introduction à l'analyse des sols par spectroscopie dans le visible et le proche infrarouge (vis-NIR) ainsi que dans le moyen infrarouge (MIR)
Spectroscopie du sol matériel de formation #1
2024"Une introduction à l'analyse des sols par spectroscopie dans le visible et le proche infrarouge (vis-NIR) ainsi que dans le moyen infrarouge (MIR)" représente le tout premier matériel de formation sur le thème de la spectroscopie des sols pour débutants développé par l'initiative GLOSOLAN-Spec (Global Soil Laboratory Network Initiative on Soil Spectroscopy) du Partenariat mondial sur les sols (Global Soil Partnership) de la FAO. Ce document offre une introduction à l'utilisation de la spectroscopie des sols pour l'analyse des sols et couvre les procédures de base fondamentales pour l'utilisation de cette technologie pour l'analyse des sols. La série " Matériel de formation à la spectroscopie des sols " fait partie du Réseau mondial des laboratoires des sols (GLOSOLAN) qui vise à renforcer les capacités des laboratoires en matière d'analyse des sols. Elle fournit une série de matériels de formation couvrant un large éventail de sujets sur la spectroscopie vis-NIR et MIR des sols. L'objectif principal est de développer des bibliothèques nationales et régionales de spectres de sol avec un service d'estimation, et de fournir des services de conseil sur l'instrumentation appropriée.
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