Training Field Soil Data for Mapping of Soil Particle Size Distribution (0–30 cm) in Brazil (MapBiomas Soil Collection 2, Beta Version)

10.60502/SoilData/P6R332MapBiomasMapBiomasTraining Field Soil Data for Mapping of Soil Particle Size Distribution (0–30 cm) in Brazil (MapBiomas Soil Collection 2, Beta Version)SoilData2024Agricultural SciencesEarth and Environmental SciencesParticle size distributionTopsoilBrazilian biomesMapBiomasMapBiomasFerreira, LaerteLaerteFerreiraSamuel-Rosa, AlessandroAlessandroSamuel-RosaHorst, Taciara ZborowskiShimbo, JuliaJuliaShimboRosa, MarcosMarcosRosaAnjos, Marcos Alexandre dosMarcos Alexandre dosAnjosHuf dos Reis, Aline MariAline MariHuf dos ReisKerber, Débora LirielDébora LirielKerberPeruzzi, VitorVitorPeruzziSerena, Gabriele Vitória SilvaGabriele Vitória SilvaSerenaPretto, Ana CarolineAna CarolinePrettoPontes, David OliveiraDavid OliveiraPontesSilva, Luciana da LuzLuciana da LuzSilvaCardoso, Marcos Vinícius SouzaMarcos Vinícius SouzaCardosoCardoso, Maria Eduarda FerreiraMaria Eduarda FerreiraCardosoAlencastro, Mary Evelyn SantosMary Evelyn SantosAlencastroSobucki, LisianeParizzi, TalitaTalitaParizziCapoane, VivianeVivianeCapoaneSouza, DeórgiaTornquist, Carlos GustavoCarlos GustavoTornquistRocha, Anderson Sandro daAnderson Sandro daRochaOliveira, SergioSergioOliveiraMunsberg, GlaucoGlaucoMunsbergAzevedo, TassoTassoAzevedo2024-12-062024-12-062025-09-241958/2023survey data137360571605835application/pdftext/tab-separated-values3.0CC BY 4.0Collection of 11,633 georeferenced points with data from 19,965 soil layers used to train regression models for mapping soil particle size distribution (0–30 cm) in Brazil. These data supported the development of clay, silt, and sand content maps in Collection 2 of the MapBiomas Soil project (beta version). Each record includes spatial coordinates, the midpoint depth of the soil layer, and additive log-ratios—log(clay/sand) and log(silt/sand)—for the 0–30 cm soil layer.Detailed description: Soil data were collected from 262 studies published in the Brazilian soil data repository SoilData (<a href=\"https://soildata.mapbiomas.org\">https://soildata.mapbiomas.org</a>). After analysis, a total of 182 studies was selected for the spatial modeling of soil particle size distribution (clay, silt, and sand). These studies represent 11,633 points distributed across Brazil, totaling 19,965 soil layers up to 40 cm in depth. For each layer, the percentage proportions of clay, silt, and sand were transformed into additive log-ratios—log(clay/sand) and log(silt/sand)—a mathematical representation that enhances the stability of the modeling process. The dataset includes the following columns:<ul><li>point_id: An alphanumeric code that identifies the source dataset ("ctb" followed by four numbers, such as ctb0003) and the ID of the soil profile, observation, or sampling point (event) in that dataset.</li><li>latitude and longitude: Decimal geographic coordinates in the WGS84 coordinate reference system (EPSG:4326).</li><li>depth: The midpoint depth of the soil layer sampled in the field.</li><li>log_clay_sand and log_silt_sand: Additive log-ratios for clay-to-sand and silt-to-sand fractions, respectively.</li></ul> The code used to process the data is available at <a href=\"https://github.com/Laboratorio-de-Pedometria/mapbiomas-soc\">https://github.com/Laboratorio-de-Pedometria/mapbiomas-soc</a>.