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dc.contributor.author
Alesso, Carlos Agustín
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dc.contributor.author
Martinez, Federico Nicolas
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dc.date.available
2024-02-07T14:57:44Z
dc.date.issued
2023-09
dc.identifier.citation
Alesso, Carlos Agustín; Martinez, Federico Nicolas; Spatial and temporal variability of corn response to nitrogen and seed rates; American Society of Agronomy; Agronomy Journal; 9-2023; 1-20
dc.identifier.issn
0002-1962
dc.identifier.uri
http://hdl.handle.net/11336/226156
dc.description.abstract
The quantification of the spatial and temporal variability of crop response to controllable inputs and the relationship with their controlling factors is important for making input prescriptions. In this study, we (1) assessed the within-field spatial variability of corn (Zea mays L.) response to nitrogen (NR) and seed (SR) rates using on-farm precision experiments (OFPE) data and geographically weighted regression (GWR) models; (2) determined the spatial agreement between NR and SR response classes, and their temporal stability; and (3) modeled the effect of weather and site-specific features on the spatial distribution of the responses. Response maps were estimated by fitting GWR models to yields and as-applied NR and SR from 14 OFPE. Responses classified into positive and non-positive response classes were spatially joined to weather, soil, and landscape covariates to train a random forest model. GWR models explained 30%–60% of yield variation. Positive responses to NR and SR represented about 46% and 33% of fields’ area, respectively, with large variation across field-year combinations. Temporal agreement was about 50%–60%, for NR and SR, respectively. The spatial agreement between NR and SR response classes suggests that factors controlling the crop response to these inputs are similar. In both cases, weather variables were the most important predictors, followed by landscape and soil attributes. Although weather variables acted at a field level, that is, field-year, the latter reflected the effect of within-field variability on crop response. To reduce this weather uncertainty, future research should consider conducting larger numbers of OFPE across multiple seasons.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Society of Agronomy
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
spatial variability
dc.subject
heterogeneity
dc.subject
Nitrogen
dc.subject
site-specific analysis
dc.subject
experiment design
dc.subject
experimental approaches
dc.subject
field-scale studies
dc.subject.classification
Agricultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Spatial and temporal variability of corn response to nitrogen and seed rates
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-02-05T13:43:10Z
dc.journal.pagination
1-20
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Alesso, Carlos Agustín. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Instituto de Ciencias Agropecuarias del Litoral. - Universidad Nacional del Litoral. Instituto de Ciencias Agropecuarias del Litoral.; Argentina
dc.description.fil
Fil: Martinez, Federico Nicolas. University of Illinois. Urbana - Champaign; Estados Unidos. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Agronomy Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1002/agj2.21471
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://acsess.onlinelibrary.wiley.com/doi/10.1002/agj2.21471
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