Analysis of spatial and temporal variability of maize productivity based on physical parameters

Detalhes bibliográficos
Autor(a) principal: Neves, Manuel Barreiros Martins Moura
Data de Publicação: 2021
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/23602
Resumo: Mestrado em Engenharia Agronómica / Instituto Superior de Agronomia. Universidade de Lisboa
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spelling Analysis of spatial and temporal variability of maize productivity based on physical parametersprecision agriculturemaizetemporal variabilityspatial variabilityspatial trend maps.Mestrado em Engenharia Agronómica / Instituto Superior de Agronomia. Universidade de LisboaThe evaluation of a field´s spatial and temporal variability, together with the mapping of its characteristics, is an important tool to help decision-making. That said, this research will have the following objectives: 1) Identification of variable and non-variable fields. 2) Study which physical parameters drive time variations in average yields. 3) Study which physical parameters drive spatial variations in average yields and to what extent the variability zones have different yields and different responses to the factors under study. 4) Development of spatial trend maps based on the combination of spatial and temporal variability in two fields of study. To meet the proposed objectives, data, referring to the years 2015-2019, were used, provided by Quinta da Cholda, Azinhaga, Portugal. The identification of variable and non-variable fields was made according to the temporal variability measured by the standard deviation. The results showed that only 5 out of 13 fields presented great income inconsistency in the defined period. For the study of temporal and spatial variation´s driving factors, multiple linear models were created. Regarding the temporal variation, the best model revealed to be the model integrating the interactions between the apparent soil electrical conductivity, the topographic wetness index, altimetry, together with the addition of the variable soil type, obtaining a model capable of explaining 81% of the existing variability. As for spatial variation, measured by average yields, two approaches were used. The first resulted in a model with the same structure as the previous one mentioned, obtaining a model capable of explaining 54% of the existing variability and the second resulted in an additive model capable of explaining 96% of the existing variability. The development of a spatial trend map allowed to create a map, which combines spatial and temporal variability and may be used in the future for the design of study and intervention zones.ISA/ULVan Heerwaarden, JoostCoelho, José Paulo Pimentel de CastroRepositório da Universidade de LisboaNeves, Manuel Barreiros Martins Moura2022-02-18T13:47:29Z20212021-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/23602engNeves, M.B.M.M. - Analysis of spatial and temporal variability of maize productivity based on physical parameters. Lisboa: ISA, 2021, 78 p.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:53:10Zoai:www.repository.utl.pt:10400.5/23602Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:07:48.156876Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Analysis of spatial and temporal variability of maize productivity based on physical parameters
title Analysis of spatial and temporal variability of maize productivity based on physical parameters
spellingShingle Analysis of spatial and temporal variability of maize productivity based on physical parameters
Neves, Manuel Barreiros Martins Moura
precision agriculture
maize
temporal variability
spatial variability
spatial trend maps.
title_short Analysis of spatial and temporal variability of maize productivity based on physical parameters
title_full Analysis of spatial and temporal variability of maize productivity based on physical parameters
title_fullStr Analysis of spatial and temporal variability of maize productivity based on physical parameters
title_full_unstemmed Analysis of spatial and temporal variability of maize productivity based on physical parameters
title_sort Analysis of spatial and temporal variability of maize productivity based on physical parameters
author Neves, Manuel Barreiros Martins Moura
author_facet Neves, Manuel Barreiros Martins Moura
author_role author
dc.contributor.none.fl_str_mv Van Heerwaarden, Joost
Coelho, José Paulo Pimentel de Castro
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Neves, Manuel Barreiros Martins Moura
dc.subject.por.fl_str_mv precision agriculture
maize
temporal variability
spatial variability
spatial trend maps.
topic precision agriculture
maize
temporal variability
spatial variability
spatial trend maps.
description Mestrado em Engenharia Agronómica / Instituto Superior de Agronomia. Universidade de Lisboa
publishDate 2021
dc.date.none.fl_str_mv 2021
2021-01-01T00:00:00Z
2022-02-18T13:47:29Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/23602
url http://hdl.handle.net/10400.5/23602
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Neves, M.B.M.M. - Analysis of spatial and temporal variability of maize productivity based on physical parameters. Lisboa: ISA, 2021, 78 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA/UL
publisher.none.fl_str_mv ISA/UL
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799131171892756480

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