In Situ VIS-NIR Spectroscopy for a Basic and Rapid Soil Investigation.

ABSTRACT: Visible and near-infrared (VIS-NIR) spectroscopy is extensively used in the field of soil science to predict several soil properties, mostly in laboratory conditions. When measured in situ, contact probes are used, and, very often, time-consuming methods are applied to generate better spectra. Unfortunately, spectra obtained by these methods differ greatly from spectra remotely acquired. This study tried to address this issue by measuring reflectance spectra directly with a fibre optic or a 4° lens on bare untouched soils. C, N content and soil texture (sand, silt, and clay) prediction models were established using partial least-square (PLS) and support vector machine (SVM) regression. With spectral pre-processing, some satisfactory models were obtained, i.e., for C content (R²

SUBMITTER: Debaene G 

PROVIDER: S-EPMC10303191 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature