Delineation of management zones to improve nitrogen management of wheat

Authors
Peralta, Nahuel; Costa, Jose Luis; Balzarini, Mónica Graciela; Castro Franco, Mauricio; Córdoba, Mariano Augusto; Bullock, Donald
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
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 84 ha), 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 < 0.05) in most fields, thus indicating that the response to N fertilization is different among MZ. Also, NUE was significantly different (p < 0.05) among MZ. The detection of soil spatial variability and the delineation of MZ are now possible on a commercial scale. The delineation of MZ affords the opportunity of variable rate application of N fertilizers on Typic Argiudolls and Petrocalcic Paleudolls, and the minimization of pollution risk due to an excessive application of resources.
EEA Balcarce
Fil: Peralta, Nahuel Raúl. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Fil: Costa, Jose Luis. INTA. Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Fil: Balzarini, Mónica Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Cordoba. Facultad de Ciencias Agropecuarias; Argentina
Fil: Castro Franco, Mauricio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina
Fil: Córdoba, Mariano Augusto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina
Fil: Bullock, Donald. University of Illinois. Department of Crop Sciences; Estados Unidos
Source
Computers and electronics in agriculture 110 : 103-113. (January 2015)
Subject
Trigo
Nitrógeno
Aplicación de Abonos
Suelo
Wheat
Nitrogen
Fertilizer Application
Soil
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/2633