FAO联合国粮农组织：2025年红外光谱法进行土壤分析的应用数据分析课程-土壤光谱训练手册2（英文版）

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