{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,5]],"date-time":"2026-02-05T10:23:54Z","timestamp":1770287034393,"version":"3.49.0"},"reference-count":86,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2021,5,3]],"date-time":"2021-05-03T00:00:00Z","timestamp":1620000000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","award":["CAPES"],"award-info":[{"award-number":["CAPES"]}],"id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["CNPq"],"award-info":[{"award-number":["CNPq"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004809","name":"Financiadora de Estudos e Projetos","doi-asserted-by":"publisher","award":["C. 0673\/13"],"award-info":[{"award-number":["C. 0673\/13"]}],"id":[{"id":"10.13039\/501100004809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Central Public-Interest Scientific Institution Basal Research Fund","award":["Y2020GH14"],"award-info":[{"award-number":["Y2020GH14"]}]},{"name":"Talented Young Scientist Program\u2014China Science and Technology Exchange Center","award":["Brazil\u201319-004"],"award-info":[{"award-number":["Brazil\u201319-004"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>We evaluated the use of airborne hyperspectral imaging and non-imaging sensors in the Vis\u2014NIR\u2014SWIR spectral region to assess particle size and soil organic matter in the surface layer of tropical soils (Oxisols, Ultisols, Entisols). The study area is near Piracicaba municipality, S\u00e3o Paulo state, Brazil, in a sugarcane cultivation area of 135 hectares. The study area, with bare soil, was imaged in April 2016 by the AisaFENIX aerotransported hyperspectral sensor, with spectral resolution of 3.5 nm between 380 and 970 nm, and 12 nm between 970 and 2500 nm. We collected 66 surface soil samples. The samples were analyzed for particle size and soil organic matter content. Laboratory spectral measurements were performed using a non-imaging spectroradiometer (ASD FieldSpec 3 Jr). Partial Least Square Regression (PLSR) was used to predict clay, silt, sand and soil organic matter (SOM). The PLSR functions developed were applied to the hyperspectral image of the study area, allowing development of a prediction map of clay, sand, and SOM. The developed PLSR models demonstrated the relationship between the predictor variables at the cross-validation step, both for the non-imaging and imaging sensors, when the highest r and R2 values were obtained for clay, sand, and SOM, with R2 over 0.67. We did not obtain a satisfactory model for silt content. For the non-imaging sensor at the prediction step, R2 values for clay and SOM were over 0.7 and sand was lower than 0.54. The imaging sensor yielded models for clay, sand, and SOM with R2 values of 0.62, 0.66, and 0.67, respectively. Pearson correlation between sensors was greater than 0.849 for the prediction of clay, sand, and SOM. Our study successfully generated, from the imaging sensor, a large-scale and detailed predicted soil maps for particle size and SOM, which are important in the management of tropical soils.<\/jats:p>","DOI":"10.3390\/rs13091782","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T22:51:42Z","timestamp":1620255102000},"page":"1782","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["Mapping Particle Size and Soil Organic Matter in Tropical Soil Based on Hyperspectral Imaging and Non-Imaging Sensors"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4854-2661","authenticated-orcid":false,"given":"Marcos Rafael","family":"Nanni","sequence":"first","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5328-0323","authenticated-orcid":false,"given":"Jos\u00e9 Alexandre Melo","family":"Dematt\u00ea","sequence":"additional","affiliation":[{"name":"Department of Soil Science, University of S\u00e3o Paulo, Piracicaba 13418-900, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7661-9166","authenticated-orcid":false,"given":"Marlon","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6904-8967","authenticated-orcid":false,"given":"Glaucio Leboso Alemparte Abrantes dos","family":"Santos","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5006-4887","authenticated-orcid":false,"given":"Amanda Silveira","family":"Reis","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Karym Mayara de","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8042-090X","authenticated-orcid":false,"given":"Everson","family":"Cezar","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Renato Herrig","family":"Furlanetto","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lu\u00eds Guilherme Teixeira","family":"Crusiol","sequence":"additional","affiliation":[{"name":"Department of Agronomy, State University of Maring\u00e1, Maring\u00e1 87020-900, PR, Brazil"},{"name":"Key Laboratory of Agricultural Remote Sensing, Ministry of Agriculture\/CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture\u2014Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2631-8909","authenticated-orcid":false,"given":"Liang","family":"Sun","sequence":"additional","affiliation":[{"name":"Key Laboratory of Agricultural Remote Sensing, Ministry of Agriculture\/CAAS-CIAT Joint Laboratory in Advanced Technologies for Sustainable Agriculture\u2014Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"858","DOI":"10.1590\/S0100-06832013000400004","article-title":"Estimativa de atributos do solo por meio de espectrorradiometria difusa","volume":"37","author":"Cezar","year":"2013","journal-title":"Rev. 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