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class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />Peterson Fiorio</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2015</p><div class="ds-work-card--work-metadata"><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">visibility</span><p class="ds2-5-body-sm" id="work-metadata-view-count">…</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">description</span><p class="ds2-5-body-sm">11 pages</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">link</span><p class="ds2-5-body-sm">1 file</p></div></div><script>(async () => { const workId = 113279795; const worksViewsPath = "/v0/works/views?subdomain_param=api&work_ids%5B%5D=113279795"; const getWorkViews = async (workId) => { 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Amostras de solo foram coletadas e analisadas em campo, em laboratório de análises químicas e por sensores Vis-NIR (400-2500 nm). Alterações nos solos da topossequência foram identificáveis nas informações espectrais. Constituintes dos solos, tais como, matéria orgânica, mineralogia, formas de óxidos de ferro e granulometria foram determinantes nas variações das feições de absorção e intensidades de reflectância. Cada perfil mostrou características espectrais diferenciadoras entre horizontes, relacionadas à intensidade, feições de absorção e morfologia da curva. A avaliação morfológica não pode ser avaliada pelo sensor, sendo uma de suas limitações. Existe relação entre grau de intemperismo (índices ki, relação silte/argila e mineralogia) e dados espectrais. Isso foi observado nos solos originados de basalto, onde houve aumento do ferro extraído pelo ditionito (cristalino e amorfo) na sequência Nitossolo Vermelho Latossólico (NVL) em direção ao Cambissolo (C) e, aumento do ferro amorfo nesta mesma sequência. Na avaliação da topossequência completa observou-se a sequência de absorção centrada em 500 e 850 nm decrescente do Nitossolo Vermelho Latossólico em direção ao Chernossolo, ou seja, na sequência de decréscimo dos teores de ferro cristalino (hematita e goethita) e aumento de ferro amorfo, corroborado pelo aumento dos valores do índice ki. Houve relação entre os dados espectrais, o índice ki e a posição do solo na paisagem. Esses resultados mostram que a espectrorradiometria é uma ferramenta promissora para auxiliar o levantamento de solos. Entretanto, há necessidade do suporte à implantação de bibliotecas de dados espectrais de solos com acesso irrestrito aos usuários. Palavras-chave: Solos-espectroscopia. Sensoriamento remoto. Mapeamento de solos.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"VIS-NIR-SWIR spectroscopy in soil evaluation along a toposequence in Piracicaba","attachmentId":93210448,"attachmentType":"pdf","work_url":"https://www.academia.edu/89399155/VIS_NIR_SWIR_spectroscopy_in_soil_evaluation_along_a_toposequence_in_Piracicaba","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/89399155/VIS_NIR_SWIR_spectroscopy_in_soil_evaluation_along_a_toposequence_in_Piracicaba"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="45304702" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/45304702/Espectroscopia_de_infravermelho_na_determina%C3%A7%C3%A3o_da_textura_do_solo">Espectroscopia de infravermelho na determinação da textura do solo</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="31884576" href="https://embrapa.academia.edu/BeataEmokeMadari">Beata Emoke Madari</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Brasileira de Ciência do Solo, 2012</p><p class="ds-related-work--abstract ds2-5-body-sm">A aplicação de técnicas espectroscópicas que utilizam a radiação infravermelha (NIRS-Near Infrared Spectroscopy e DRIFTS-Diffuse Reflectance Fourier Transformed Spectroscopy) na análise inorgânica do solo tem sido proposta desde a década de 1970, mas até os dias atuais são raros os métodos implementados rotineiramente no Brasil. Isso deve-se à dificuldade em construir modelos de calibração, por meio de métodos estatísticos multivariados, utilizando-se amostras reais de solo, de constituição complexa, que varia geograficamente e de acordo com o manejo. Por isso, os objetivos deste trabalho foram construir modelos de calibração em NIRS e DRIFTS para a quantificação das frações de argila e areia, em amostras de solos de classes diferentes - Latossolo Vermelho (predominante), Nitossolo, Argissolo Vermelho e Neossolo Quartzarênico - e avaliar qual dessas duas técnicas é mais adequada para essa finalidade, assim como a interferência do agrupamento de amostras e da seleção de variáveis esp...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Espectroscopia de infravermelho na determinação da textura do solo","attachmentId":65854820,"attachmentType":"pdf","work_url":"https://www.academia.edu/45304702/Espectroscopia_de_infravermelho_na_determina%C3%A7%C3%A3o_da_textura_do_solo","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/45304702/Espectroscopia_de_infravermelho_na_determina%C3%A7%C3%A3o_da_textura_do_solo"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="102886216" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/102886216/Utiliza%C3%A7%C3%A3o_de_an%C3%A1lise_multivariada_plsr_e_espectroscopia_vis_nir_na_predi%C3%A7%C3%A3o_de_atributos_f%C3%ADsicos_do_solo">Utilização de análise multivariada plsr e espectroscopia vis_nir na predição de atributos físicos do solo</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="271090212" href="https://independent.academia.edu/RoneyBertideOliveira">Roney Berti de Oliveira</a></div><p class="ds-related-work--abstract ds2-5-body-sm">This study aimed to assess the method of multivariate analysis: chemometric program Parles by PLSR prediction of physical attributes (sand, silt and clay) soil by means of reflectance data from a laboratory spectroradiometer. The areas chosen for the study are located in the northwest of Paraná, in lithosequence located in the transition zone between basalt and sandstone. We collected soil samples characterizing the A and B horizons and these were subjected to physical analysis at the State University of Maringá. The spectral readings were performed on a spectroradiometer in the range 350-2500 nm, enabling the prediction of soil attributes by their spectral response. We adopted two methods for building predictive models, the first was the use of bulk samples (HA HB) for prediction of attributes. The second methodology is the separation of the HA samples (0-0.20 m) and HB (0.80-1m) and consequently, obtaining a prediction model for the horizons separated diagnostically. Aggregate sam...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Utilização de análise multivariada plsr e espectroscopia vis_nir na predição de atributos físicos do solo","attachmentId":103037502,"attachmentType":"pdf","work_url":"https://www.academia.edu/102886216/Utiliza%C3%A7%C3%A3o_de_an%C3%A1lise_multivariada_plsr_e_espectroscopia_vis_nir_na_predi%C3%A7%C3%A3o_de_atributos_f%C3%ADsicos_do_solo","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/102886216/Utiliza%C3%A7%C3%A3o_de_an%C3%A1lise_multivariada_plsr_e_espectroscopia_vis_nir_na_predi%C3%A7%C3%A3o_de_atributos_f%C3%ADsicos_do_solo"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="23511016" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/23511016/Spectral_analysis_of_soils_from_Mogi_Gua%C3%A7%C3%BA_SP_Region_An%C3%A1lise_espectral_de_solos_da_Regi%C3%A3o_de_Mogi_Gua%C3%A7%C3%BA_SP_">Spectral analysis of soils from Mogi-Guaçú (SP) Region Análise espectral de solos da Região de Mogi-Guaçú (SP)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="45518824" href="https://independent.academia.edu/PetersonFiorio">Peterson Fiorio</a></div><p class="ds-related-work--abstract ds2-5-body-sm">With the development of remote sensing techniques, the understanding of soil spectral response with the purpose to assist soil mapping and estimate soil attributes, become necessary. For this, the objective of this work was to analyze the spectral response of eight soil profiles from Mogi-Guaçú (SP) region obtained in laboratory and correlate them with soil texture and their chemical and mineralogical characteristics. The soils were sampled in each horizon and radiometric data was obtained by a spectroradiometer in laboratory. It was possible to discriminate the spectral response of each soil and relate them with texture, organic matter and iron oxides content. The analysis of reflected electromagnetic energy permitted to evaluate the soils mineralogical compounds like iron oxides, kaolinite, gibbsite and 2:1 clay minerals. These results indicate that this technique can be used as an auxiliary method in soil studies and mapping. Com o desenvolvimento das técnicas de sensoriamento re...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Spectral analysis of soils from Mogi-Guaçú (SP) Region Análise espectral de solos da Região de Mogi-Guaçú (SP)","attachmentId":43946984,"attachmentType":"pdf","work_url":"https://www.academia.edu/23511016/Spectral_analysis_of_soils_from_Mogi_Gua%C3%A7%C3%BA_SP_Region_An%C3%A1lise_espectral_de_solos_da_Regi%C3%A3o_de_Mogi_Gua%C3%A7%C3%BA_SP_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/23511016/Spectral_analysis_of_soils_from_Mogi_Gua%C3%A7%C3%BA_SP_Region_An%C3%A1lise_espectral_de_solos_da_Regi%C3%A3o_de_Mogi_Gua%C3%A7%C3%BA_SP_"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="22073017" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/22073017/Caracteriza%C3%A7%C3%A3o_de_solos_em_uma_topossequ%C3%AAncia_sob_terra%C3%A7os_aluviais_na_regi%C3%A3o_do_m%C3%A9dio_rio_Madeira_AM_Characterization_of_soils_in_a_toposequence_under_alluvial_terraces_in_the_middle_rio_Madeira_AM_">Caracterização de solos em uma topossequência sob terraços aluviais na região do médio rio Madeira (AM) / Characterization of soils in a toposequence under alluvial terraces in the middle rio Madeira (AM)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="43362140" href="https://ufam.academia.edu/HeronCosta">Heron Costa</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Ambiência, 2012</p><p class="ds-related-work--abstract ds2-5-body-sm">Vários estudos preocuparam-se em investigar as relações existentes entre os atributos do solo e as paisagens em diferentes locais, neste contexto o objetivo do trabalho foi estudar a caracterização de solos em uma topossequência sob terraços aluviais na região do médio rio Madeira (AM). Estabeleceu-se um caminhamento e com base na vegetação e no relevo, a paisagem foi subdividida em quatro segmentos de vertente: a) campo natural; b) cerradão; c) floresta; e d) floresta de galeria. Foi aberta uma trincheira em cada unidade de vertente e realizado a sua caracterização morfológica, realizou-se as analises físicas (análise granulométrica, Ds, Dp e Pt) e químicas (pH em água e KCl, Ca, Mg, K, P disponivel, Al trocável, H + Al e C orgânico). A textura do solo foi semelhante (franco argila siltosa, franco siltosa e argilo siltosa), a fração silte foi dominante em todos os solos analisados, a Pt do solo foi maior nos horizontes superficiais devido o menor valor de densidade do solo. Verificou-se que a topografia exprime solos completamente diferentes ao longo do relevo e que as mudanças deste interferem na capacidade de uso destes. Os solos foram classificados como Gleissolo Háplico, Cambissolo Háplico alítico e Cambissolo Háplico aluminico e Gleissolo Háplico. Observou-se que os solos 320 apresentaram predominância de silte como a fração dominante. A saturação por bases e a soma de bases foram baixas, já a saturação por alumínio foi elevada em todos os solos, o que confere um caráter distrófico e álico respectivamente aos solos estudados.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Caracterização de solos em uma topossequência sob terraços aluviais na região do médio rio Madeira (AM) / Characterization of soils in a toposequence under alluvial terraces in the middle rio Madeira (AM)","attachmentId":42748101,"attachmentType":"pdf","work_url":"https://www.academia.edu/22073017/Caracteriza%C3%A7%C3%A3o_de_solos_em_uma_topossequ%C3%AAncia_sob_terra%C3%A7os_aluviais_na_regi%C3%A3o_do_m%C3%A9dio_rio_Madeira_AM_Characterization_of_soils_in_a_toposequence_under_alluvial_terraces_in_the_middle_rio_Madeira_AM_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/22073017/Caracteriza%C3%A7%C3%A3o_de_solos_em_uma_topossequ%C3%AAncia_sob_terra%C3%A7os_aluviais_na_regi%C3%A3o_do_m%C3%A9dio_rio_Madeira_AM_Characterization_of_soils_in_a_toposequence_under_alluvial_terraces_in_the_middle_rio_Madeira_AM_"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="75811025" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/75811025/Avalia%C3%A7%C3%B5es_visuais_como_%C3%ADndice_de_qualidade_do_solo_e_sua_valida%C3%A7%C3%A3o_por_an%C3%A1lises_f%C3%ADsicas_e_qu%C3%ADmicas_em_um_latossolo_vermelho_distrof%C3%A9rrico_com_usos_e_manejos_distintos">Avaliações visuais como índice de qualidade do solo e sua validação por análises físicas e químicas em um latossolo vermelho distroférrico com usos e manejos distintos</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="22667829" href="https://independent.academia.edu/RicardoCoelho11">Ricardo Coelho</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Brasileira de Ciência do Solo, 2010</p><p class="ds-related-work--abstract ds2-5-body-sm">Os sistemas de cultivo modificam os atributos do solo e podem alterar sua qualidade. Tradicionalmente avaliados por métodos laboratoriais, os atributos do solo vêm sendo empregados como indicadores de sua qualidade e, embora sejam bastante exatos, são muitas vezes de difícil acesso ou apresentam custos elevados em avaliações de larga escala. A avaliação visual da qualidade do solo (AVS) pode fornecer, de maneira rápida, confiável e barata, informações necessárias ao planejamento agrícola, constituindo uma importante ferramenta para identificar ou monitorar práticas de manejo sustentáveis. O objetivo deste trabalho foi avaliar o desempenho da AVS no estabelecimento de um índice de qualidade do solo, visando avaliar a sustentabilidade de práticas de manejo do solo. Os experimentos envolveram tratamentos de cultivo de graníferas em sistema plantio direto há 20 e 8 anos, graníferas com aplicação de três doses de lodo de esgoto, algodão em plantio convencional, cultura permanente (sering...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Avaliações visuais como índice de qualidade do solo e sua validação por análises físicas e químicas em um latossolo vermelho distroférrico com usos e manejos distintos","attachmentId":83462504,"attachmentType":"pdf","work_url":"https://www.academia.edu/75811025/Avalia%C3%A7%C3%B5es_visuais_como_%C3%ADndice_de_qualidade_do_solo_e_sua_valida%C3%A7%C3%A3o_por_an%C3%A1lises_f%C3%ADsicas_e_qu%C3%ADmicas_em_um_latossolo_vermelho_distrof%C3%A9rrico_com_usos_e_manejos_distintos","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/75811025/Avalia%C3%A7%C3%B5es_visuais_como_%C3%ADndice_de_qualidade_do_solo_e_sua_valida%C3%A7%C3%A3o_por_an%C3%A1lises_f%C3%ADsicas_e_qu%C3%ADmicas_em_um_latossolo_vermelho_distrof%C3%A9rrico_com_usos_e_manejos_distintos"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="3815760" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/3815760/Niveis_de_avaliacao_para_solo_soil_screening_levels_aplicados_pela_usepa">Niveis de avaliacao para solo soil screening levels aplicados pela usepa</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="4693681" href="https://independent.academia.edu/AugustoEhlersSouza">Augusto Ehlers Souza</a></div><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Niveis de avaliacao para solo soil screening levels aplicados pela usepa","attachmentId":31469152,"attachmentType":"pdf","work_url":"https://www.academia.edu/3815760/Niveis_de_avaliacao_para_solo_soil_screening_levels_aplicados_pela_usepa","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/3815760/Niveis_de_avaliacao_para_solo_soil_screening_levels_aplicados_pela_usepa"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="94453717" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/94453717/Espectros_Vis_NIR_do_Solo_e_Fuzzy_K_M%C3%A9dias_Aplicados_na_Delimita%C3%A7%C3%A3o_de_Unidades_de_Mapeamento_de_Solos_em_Topossequ%C3%AAncias">Espectros Vis-NIR do Solo e Fuzzy K-Médias Aplicados na Delimitação de Unidades de Mapeamento de Solos em Topossequências</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="47369832" href="https://independent.academia.edu/MarilusaLacerda">Marilusa Lacerda</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Brasileira de Ciência do Solo, 2015</p><p class="ds-related-work--abstract ds2-5-body-sm">RESUMO O conhecimento dos solos é cada vez mais importante para que o uso dele seja realizado corretamente na agropecuária, no crescimento urbano, na conservação dos recursos naturais, entre outros. Entretanto, verifica-se carência de profissionais qualificados para a caracterização e os mapeamentos pedológicos, particularmente em escalas de maior detalhamento. Essa carência, aliada aos avanços das ferramentas computacionais e do sensoriamento remoto, promoveu o surgimento do Mapeamento Digital de Solos (MDS), que busca auxiliar e agilizar as atividades de levantamento pedológico. Assim, este trabalho objetivou desenvolver uma metodologia de delimitaçao de unidades de solos em topossequências por meio do comportamento espectral dos solos no comprimento de onda do Visível-Infravermelho Próximo (Vis-NIR). A metodologia espectral consistiu na obtenção das curvas espectrais dos solos por meio do espectrorradiômetro FieldSpecPro e da redução do número de informações espectrais por meio d...</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Espectros Vis-NIR do Solo e Fuzzy K-Médias Aplicados na Delimitação de Unidades de Mapeamento de Solos em Topossequências","attachmentId":96905854,"attachmentType":"pdf","work_url":"https://www.academia.edu/94453717/Espectros_Vis_NIR_do_Solo_e_Fuzzy_K_M%C3%A9dias_Aplicados_na_Delimita%C3%A7%C3%A3o_de_Unidades_de_Mapeamento_de_Solos_em_Topossequ%C3%AAncias","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/94453717/Espectros_Vis_NIR_do_Solo_e_Fuzzy_K_M%C3%A9dias_Aplicados_na_Delimita%C3%A7%C3%A3o_de_Unidades_de_Mapeamento_de_Solos_em_Topossequ%C3%AAncias"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="2954157" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/2954157/Combina%C3%A7%C3%A3o_das_bandas_do_SWIR_e_TIR_do_sensor_ASTER_para_identificar_solos_quartzosos_e_%C3%A1reas_degradadas_associadas">Combinação das bandas do SWIR e TIR do sensor ASTER para identificar solos quartzosos e áreas degradadas associadas </a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="159361" href="https://ufpr-br.academia.edu/FabioMarceloBreunig">Fabio Marcelo Breunig</a></div><p class="ds-related-work--abstract ds2-5-body-sm">Remote sensing is an auxiliary tool to access soil and environmental parameters, allowing synoptic and long time coverage. In this way, the combined use of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) short wave infrared (SWIR) and thermal infrared (TIR) images were evaluated for the identification of sandy soil surfaces (topsoil) and associated land degradation areas. The images were acquired on September 7, 2006 over an agricultural area (soybean, maize and cotton) from central Brazil. Topsoil samples were collected for laboratory physical-chemical analyses. To discriminate non-photosynthetic vegetation (NPV) from bare soil pixels, the soil fraction image (>0.65) of the linear spectral unmixing model was used. As a complementary approach, SWIR (bands 5 and 6) and TIR (bands 10 and 14) normalizations with threshold values of 0.05 (dark soil) and 3 (bright soil), respectively, were applied. To estimate total sand fraction over bare soil pixels identified from the previous approach, a TIR band ratio (b10/b14) fitted with a polynomial regression (R 2 =0.63, =0.05) was used. Results showed that some areas with total sand fraction values larger than 90% were coincident with land degradation processes verified in field and caused by the abrupt removal of the Brazilian savanna (Cerrado) over quartz-bearing soils.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Combinação das bandas do SWIR e TIR do sensor ASTER para identificar solos quartzosos e áreas degradadas associadas ","attachmentId":33661529,"attachmentType":"pdf","work_url":"https://www.academia.edu/2954157/Combina%C3%A7%C3%A3o_das_bandas_do_SWIR_e_TIR_do_sensor_ASTER_para_identificar_solos_quartzosos_e_%C3%A1reas_degradadas_associadas","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/2954157/Combina%C3%A7%C3%A3o_das_bandas_do_SWIR_e_TIR_do_sensor_ASTER_para_identificar_solos_quartzosos_e_%C3%A1reas_degradadas_associadas"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="64260475" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/64260475/Aplica%C3%A7%C3%A3o_da_espectroscopia_no_infravermelho_pr%C3%B3ximo_e_m%C3%A9dio_na_avalia%C3%A7%C3%A3o_da_biomassa_microbiana_do_solo">Aplicação da espectroscopia no infravermelho próximo e médio na avaliação da biomassa microbiana do solo</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="29927538" href="https://ufmg.academia.edu/TulioMatencio">Tulio Matencio</a></div><p class="ds-related-work--abstract ds2-5-body-sm">Aplicação da espectroscopia no infravermelho e difração de raio-X na determinação de sacarina em adoçantes líquidos artificiais pelo método volumétrico com Ag+</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Aplicação da espectroscopia no infravermelho próximo e médio na avaliação da biomassa microbiana do solo","attachmentId":76376885,"attachmentType":"pdf","work_url":"https://www.academia.edu/64260475/Aplica%C3%A7%C3%A3o_da_espectroscopia_no_infravermelho_pr%C3%B3ximo_e_m%C3%A9dio_na_avalia%C3%A7%C3%A3o_da_biomassa_microbiana_do_solo","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/64260475/Aplica%C3%A7%C3%A3o_da_espectroscopia_no_infravermelho_pr%C3%B3ximo_e_m%C3%A9dio_na_avalia%C3%A7%C3%A3o_da_biomassa_microbiana_do_solo"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div></div></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":110280122,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":110280122,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_110280122" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. 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tropicais","attachmentId":104445007,"attachmentType":"pdf","work_url":"https://www.academia.edu/104817182/Emprego_do_ensaio_SPT_s%C3%ADsmico_na_investiga%C3%A7%C3%A3o_de_solos_tropicais","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/104817182/Emprego_do_ensaio_SPT_s%C3%ADsmico_na_investiga%C3%A7%C3%A3o_de_solos_tropicais"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="3" data-entity-id="102989389" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md 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data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/26634701/%C3%8Dndice_S_para_avalia%C3%A7%C3%A3o_da_qualidade_f%C3%ADsica_de_solos">Índice S para avaliação da qualidade física de solos</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="34733077" href="https://independent.academia.edu/CelsemyMaia">Celsemy Maia</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Brasileira de Ciência do Solo, 2011</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Índice S para avaliação da qualidade física de 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