Barthès Bernard auteur aut IRD Brunet Didier auteur aut IRD Hien E. auteur aut IRD Enjalric F. auteur aut IRD Conche Sofian auteur aut IRD Freschet Grégoire auteur aut IRD d'Annunzio R. auteur aut IRD Toucet Louri Joëlle auteur aut IRD text journalArticle eng text/pdf born digital access This study aimed at assessing the potential of near-infrared reflectance spectroscopy (NIRS) for determining the distribution of soil organic matter (SOM) in particle size fractions, which has rarely been attempted. This was done on sandy soils from Burkina Faso (three sites) and Congo-Brazzaville (one site). Over the total sample set, NIRS accurately predicted carbon (C) and nitrogen (N) concentrations (g kg(-1) fraction) in the fraction <20 mu m. When considering Burkina Faso only, predictions were improved in general; those of C and N amounts (g kg(-1) soil) became accurate for the fraction <20 mu m but not for the coarser fractions, probably due to heterogeneous SOM repartition. However, most SOM being <20 mu m in general, NIRS could be considered promising for determining SOM size distribution. specialized Soil organic matter Particle size fractions Near-infrared reflectance spectroscopy (nirs) 068 40 6 1533-1537 2008 0038-0717 https://www.documentation.ird.fr/hor/fdi:010042647 10.1016/j.soilbio.2007.12.023 0038-0717 [F B010042647] https://www.documentation.ird.fr/hor/fdi:010042647 https://www.documentation.ird.fr/intranet/publi/2008/07/010042647.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-08-08 2023-07-26 fdi:010042647 fre