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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A sensors-based profile heterogeneity index for soil characterization

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Author(s):
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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]
Total Authors: 12
Affiliation:
[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
Total Affiliations: 4
Document type: Journal article
Source: CATENA; v. 207, DEC 2021.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 17/22292-4 - Geology-Geomorphology-Pedology relationship associated with oxisols genesis of the West of Minas Gerais
Grantee:Karina Patrícia Prazeres Marques
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/22262-0 - Geotechnologies on a detailed digital soil mapping and the Brazilian soil spectral library: development and applications
Grantee:José Alexandre Melo Demattê
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/26124-6 - Precision pedology: soil characterisation and mapping in real time using geotechnologies
Grantee:Wanderson de Sousa Mendes
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 16/01597-9 - Pedotransfer functions by geotecnologies associated with photopedology for pedological mapping in agricultural areas of São Paulo State
Grantee:José Lucas Safanelli
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)