Soil Iron Oxides via Diffuse Reflectance R package OxSR version 1.0.1 Calculate the ratio of iron oxides, hematite and goethite, in soil using the diffuse reflectance technique. The Kubelka-Munk theory, second derivative analysis, and spectral region amplitudes related to hematite and goethite content are used for quantification (Torrent, J., & Barron, V. (2008) <doi:10.2136/sssabookser5.5.c13>). Additionally, the package calculates soil color in the visible spectrum using Munsell and RGB color spaces, based on color theory (Viscarra et al. (2006) <doi:10.1016/j.geoderma.2005.07.017>). Software Depends: R (>= 4.1.0) Imports: colorSpec, dplyr, ggplot2, grDevices, janitor, munsellinterpol, rlang, stats Suggests: spelling, testthat (>= 3.0.0) Gustavo Frosi <gustavofrosi@hotmail.com> Comprehensive R Archive Network (CRAN) Gustavo Frosi [aut, cre] (ORCID: <https://orcid.org/0000-0002-0324-636X>), Vidal Barrón [aut] (ORCID: <https://orcid.org/0000-0003-1484-1655>), Alberto Inda [aut] (ORCID: <https://orcid.org/0000-0001-5252-0313>), Kayn Bastiani [aut] (ORCID: <https://orcid.org/0000-0003-2692-1695>) AGPL (>= 3) 2025-03-18 application/tgz https://CRAN.R-project.org/package=OxSR doi:10.32614/CRAN.package.OxSR en-US