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Geotechnologies for mapping agricultural soils of São Paulo State

Grant number: 18/21356-1
Support type:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): January 10, 2019
Effective date (End): July 09, 2019
Field of knowledge:Agronomical Sciences - Agronomy
Principal Investigator:José Alexandre Melo Demattê
Grantee:José Lucas Safanelli
Supervisor abroad: Sabine Chabrillat
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Local de pesquisa : Helmholtz Association, Germany  
Associated to the scholarship:16/01597-9 - Pedotransfer functions by geotecnologies associated with photopedology for pedological mapping in agricultural areas of São Paulo State, BP.DD

Abstract

Soil maps are essential guidelines for promoting the correct planning and use of soils. However, less than 5 percent of the Brazilian territory has detailed information about this natural resource. The use of remote sensing and cloud processing can support the mapping of soil properties with detailed spatial resolution, with the benefits of fast execution, economic resources save, which can be adapted for any large extent area. However, there are still limitations in getting specific information about soils from satellite images. We are going to develop a processing system based on cloud computing to assess the agricultural soils of São Paulo, Brazil. Using databases of topsoil information and machine learning algorithms, we are going to process multitemporal historical images and calibrate prediction models to map clay, sand, organic carbon, pH, cation exchange capacity, base saturation and total iron content. The results will be used to evaluate how the agricultural intensification has occurred regarding soil properties distribution and forecast the impacts of the current soil conditions on agricultural sustainability. Such development can be expanded to other agricultural regions of Brazil and around the world, promoting a better assessment and planning of agricultural soils.

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