Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/1734 |
Resumo: | Maize yield data were collected in seven agricultural fields irrigated by centre-pivot irri-gation systems, in Southern Portugal, from 2002 to 2004. These data were then correlated with different primary and secondary topographic attributes. The attained correlation coefficients were used to evaluate the relationship between yield spatial variability and each individual topographic attribute. In this three-year period applied water was always lower than crop water requirements. The increase of applied water in 2004 resulted in an improvement in average yield and especially in yield spatial stability. Average yield showed a strong dependency on topography, with high correlation coefficients between yield and elevation and slope. It presented also a high correlation with topographic indices that reflect field water availability, such as the wetness index and distance to flow accumulation lines (DFL). The DFL index was the topographic index with higher correlation coefficients with yield. The negative coefficients of correlation between yield and DFL, attained in most fields in the three-year study period, show that, in general, yield increases with the decrease of DFL, i.e., with the increase of water availability. In undulating land areas flow lines are very abundant, which means that, in these conditions, the DFL index can be a good tool to evaluate yield spatial variability. |
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Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributesyield variabilitytopographic indicesvariabilidade da produçãoindices topográficosMaize yield data were collected in seven agricultural fields irrigated by centre-pivot irri-gation systems, in Southern Portugal, from 2002 to 2004. These data were then correlated with different primary and secondary topographic attributes. The attained correlation coefficients were used to evaluate the relationship between yield spatial variability and each individual topographic attribute. In this three-year period applied water was always lower than crop water requirements. The increase of applied water in 2004 resulted in an improvement in average yield and especially in yield spatial stability. Average yield showed a strong dependency on topography, with high correlation coefficients between yield and elevation and slope. It presented also a high correlation with topographic indices that reflect field water availability, such as the wetness index and distance to flow accumulation lines (DFL). The DFL index was the topographic index with higher correlation coefficients with yield. The negative coefficients of correlation between yield and DFL, attained in most fields in the three-year study period, show that, in general, yield increases with the decrease of DFL, i.e., with the increase of water availability. In undulating land areas flow lines are very abundant, which means that, in these conditions, the DFL index can be a good tool to evaluate yield spatial variability.Elsevier2009-09-23T11:08:46Z2009-09-232008-09-23T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article6908 bytesapplication/pdfhttp://hdl.handle.net/10174/1734http://hdl.handle.net/10174/1734eng183-1901537-51102Biosystems Engineering101101livreICAAMjmsilva@uevora.ptllsilva@uevora.pt580Marques da Silva, José RafaelSilva, Luis Leopoldoinfo: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:RCAAP2024-01-03T18:37:16Zoai:dspace.uevora.pt:10174/1734Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:57:26.549986Repositório 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 |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
title |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
spellingShingle |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes Marques da Silva, José Rafael yield variability topographic indices variabilidade da produção indices topográficos |
title_short |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
title_full |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
title_fullStr |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
title_full_unstemmed |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
title_sort |
Evaluation of the relationship between maize yield spatial and temporal variability and different topographic attributes |
author |
Marques da Silva, José Rafael |
author_facet |
Marques da Silva, José Rafael Silva, Luis Leopoldo |
author_role |
author |
author2 |
Silva, Luis Leopoldo |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Marques da Silva, José Rafael Silva, Luis Leopoldo |
dc.subject.por.fl_str_mv |
yield variability topographic indices variabilidade da produção indices topográficos |
topic |
yield variability topographic indices variabilidade da produção indices topográficos |
description |
Maize yield data were collected in seven agricultural fields irrigated by centre-pivot irri-gation systems, in Southern Portugal, from 2002 to 2004. These data were then correlated with different primary and secondary topographic attributes. The attained correlation coefficients were used to evaluate the relationship between yield spatial variability and each individual topographic attribute. In this three-year period applied water was always lower than crop water requirements. The increase of applied water in 2004 resulted in an improvement in average yield and especially in yield spatial stability. Average yield showed a strong dependency on topography, with high correlation coefficients between yield and elevation and slope. It presented also a high correlation with topographic indices that reflect field water availability, such as the wetness index and distance to flow accumulation lines (DFL). The DFL index was the topographic index with higher correlation coefficients with yield. The negative coefficients of correlation between yield and DFL, attained in most fields in the three-year study period, show that, in general, yield increases with the decrease of DFL, i.e., with the increase of water availability. In undulating land areas flow lines are very abundant, which means that, in these conditions, the DFL index can be a good tool to evaluate yield spatial variability. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-09-23T00:00:00Z 2009-09-23T11:08:46Z 2009-09-23 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/1734 http://hdl.handle.net/10174/1734 |
url |
http://hdl.handle.net/10174/1734 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
183-190 1537-5110 2 Biosystems Engineering 101 101 livre ICAAM jmsilva@uevora.pt llsilva@uevora.pt 580 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
6908 bytes application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
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1799136458629447680 |