Delineation of management zones to improve nitrogen management of wheat

•The management zone were delineated by using ECa, terrain elevation and soil depth.•The response to N fertilization of wheat is different among management zone.•The delimiting of management zone improved the N use efficiency (NUE) in wheat.•The application of variable N rates increases production s...

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Bibliographic Details
Published in:Computers and electronics in agriculture 2015-01, Vol.110, p.103-113
Main Authors: Peralta, Nahuel Raúl, Costa, José Luis, Balzarini, Mónica, Castro Franco, Mauricio, Córdoba, Mariano, Bullock, Donald
Format: Article
Language:English
Subjects:
Agricultural chemicals
Apparent soil electrical conductivity
Delineation
Fertilizing
Management
Management zones
Monitors
Resistivity
Risk
Soil (material)
Soil depth
Terrain attributes
Triticum aestivum
Wheat
Yield maps
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Summary:•The management zone were delineated by using ECa, terrain elevation and soil depth.•The response to N fertilization of wheat is different among management zone.•The delimiting of management zone improved the N use efficiency (NUE) in wheat.•The application of variable N rates increases production system sustainability. Site-specific management of N (NSSM) is an attractive and intuitive approach to increasing N fertilizer use efficiency (NUE) of agricultural systems by adjusting fertilizer rates to the soil characteristics. The objective of this study is to assess: whether delineating of management zone (MZ) within fields improves NUE in wheat (Triticum aestivum L.). This research was carried out at 5 commercial fields (between 26 and 84ha), located in the south-eastern portion of the Province of Buenos Aires, Argentina. The MZ were delineated by using georeferenced measurements of apparent soil electrical conductivity, terrain elevation and soil depth. Spatially referenced wheat yields were recorded with a yield monitor equipped with DGPS. The interaction effect was significant (p
ISSN:0168-1699
1872-7107
DOI:10.1016/j.compag.2014.10.017