A sensors-based profile heterogeneity index for soil characterization

Autor(es):Mostrar menos -

Barros e Souza, Arnaldo ^[1] ; Dematte, Jose A. M. ^[1] ; Bellinaso, Henrique ^{[1, 2]} ; de Mello, Danilo Cesar ^[3] ; da Silva Lisboa, Caroline Jardim ^[1] ; de Oliveira Mello, Fellipe Alcantara ^[1] ; Marques, Karina P. P. ^[1] ; Bispo de Resende, Maria Eduarda ^[1] ; Reis, Josimar Vieira ^[1] ; Mancini, Marcelo ^[4] ; Godinho Silva, Sergio Henrique ^[4] ; Curi, Nilton ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Soil Sci, Av Padua Dias 11, CP 9, BR-13418900 Piracicaba, SP - Brazil

^[2] EDR Piracicaba, Secretariat Agr & Supply CATI CDRS SAA, Coordinat Sustainable Rural Dev, Campos Salles St 507, Piracicaba, SP - Brazil

^[3] Univ Fed Vicosa, Dept Soil Sci, Av Peter Henry Rolfs S-N Campus Univ Vicosa, BR-36570900 Vicosa, MG - Brazil

^[4] Univ Fed Lavras, Dept Soil Sci, Av Aquenta Sol, BR-37200000 Lavras, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CATENA; v. 207, DEC 2021.
• Citações Web of Science: 0

Resumo

The technological and computational development has raised new possibilities for soil scientists to describe and infer about soil-forming processes and functions. Thus, why not to insert the contrasts between soil layers in a profile revealed by proximal sensing? We proposed to study the soil profile heterogeneity by reflectance (Vis-NIR-SWIR), X-ray fluorescence and magnetic susceptibility aiming to quantify it with the proposed ``Profile Heterogeneity Index{''} (PHI) through seven soil sequences in twenty-seven locations over different hillslope positions and parent materials. The study was conducted in a 165-ha farm, at Rio das Pedras municipality, Sao Paulo State, Brazil. The differences between two consecutive soil layers were calculated by subtracting the data to the bottom and the immediately above for each soil profile. The results are depicted as a depth function with proportional colors to highlight the heterogeneity in the soil profiles. This approach provided a new method to identify where the transitions of soil attributes occur exactly and improve the understanding about soil-formation factors and processes. In this study, greater PHI values were mainly related to erosion and redeposition process through the landscape, differences in soil parent materials and also soil-forming processes. The sensors can furnish important and complementary information to the characterization of soil profile heterogeneity. (AU)

• Processo FAPESP: 17/22292-4 - Relação Geologia-Geomorfologia-Pedologia associada à gênese de latossolos do Oeste de Minas Gerais
• Beneficiário: Karina Patrícia Prazeres Marques
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/22262-0 - Geotecnologias no mapeamento digital pedológico detalhado e biblioteca espectral de solos do Brasil: desenvolvimento e aplicações
• Beneficiário: José Alexandre Melo Demattê
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/26124-6 - Pedologia de precisão: caracterização e mapeamento de solos em tempo real por geotecnologias
• Beneficiário: Wanderson de Sousa Mendes
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 16/01597-9 - Pedotransferência por geotecnologias associada à fotopedologia com vistas ao mapeamento pedológico de áreas agrícolas do estado de São Paulo
• Beneficiário: José Lucas Safanelli
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto