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| Franceschini,Marston Héracles Domingues; Demattê,José Alexandre M.; Sato,Marcus Vinicius; Vicente,Luiz Eduardo; Grego,Célia Regina. |
| O objetivo deste trabalho foi avaliar o potencial da espectroscopia de reflectância no VIS-NIR-SWIR, para a caracterização granulométrica de amostras de solos de diferentes classes texturais, e obter modelos de predição dos teores de argila, silte e areia no solo. Utilizou-se um conjunto de amostras representativas de Latossolos e Argissolo de cinco locais do Estado do Mato Grosso do Sul. Os espectros do visível e do infravermelho próximo ao infravermelho de ondas curtas (de 350 a 2.500 nm) das amostras foram obtidos e analisados. Empregaram-se a análise de componentes principais (ACP), agrupamento por "fuzzy c-means", regressão logística multinomial (RLM) e regressão por mínimos quadrados parciais. Espectros característicos para as diferentes classes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Granulometria do solo; Espectroscopia de reflectância; Estatística multivariada; Pedometria; Sensoriamento próximo. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001200006 |
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| Poppiel,Raúl Roberto; Lacerda,Marilusa Pinto Coelho; Oliveira Junior,Manuel Pereira de; Demattê,José Alexandre Melo; Romero,Danilo Jefferson; Sato,Marcus Vinicius; Almeida Júnior,Leonardo Rafael de; Cassol,Luiz Felipe Moreira. |
| ABSTRACT: Traditional method of soil survey is expensive, slow, and must be carried out by experienced researchers. Thus, advances in soil observation technologies and the need to obtain information quickly by modern techniques have intensified the use of proximal sensing. This study characterized surface reflectance spectra (A horizon) and related them to traditional soil classification, based on morphological, physical, and chemical properties of representative pedogenetic profiles, developed in two toposequences of the Distrito Federal, Brazil. In the toposequences, 15 soil profiles were selected for a complete morphological description and sampling for laboratory analyses. Soil-landscape relationships were established, and profiles were classified to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Toposequences; Soil-landscape relationships; Soil spectroscopy; Spectral morphology; Kubelka-Munk. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100300 |
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| Demattê,José A. M.; Alves,Marcelo Rodrigo; Gallo,Bruna Cristina; Fongaro,Caio T.; Souza,Arnaldo Barros e; Romero,Danilo Jefferson; Sato,Marcus Vinicius. |
| Minimizing environmental impacts and increasing crop productivity depend mainly on the knowledge of chemical, physical and mineralogical characteristics of the soil attributes. However, traditional methods are timeconsuming and costly. The objective of this study was to determine and validate a method to quantify soil attributes using UV-Vis-NIR Spectroscopy as an alternative to conventional methods of soil analyses. The work comprised two main phases: (1) creation and calibration of statistical models to determine the soil attributes derived from spectral data extracted from soil samples collected in area 1, (2) validation of statistical models in area 2 and correlations between the estimated and observed values (conventional method) for each soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reflectance; Soil analysis; Remote Sensing. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200223 |
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