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Resumen
In semi-arid regions, soil water and nitrogen (N) are generally limiting factors for corn (Zea mays L.) production; hence, implementation of appropriate N fertilization strategies is needed. The use of precision agriculture practices based on specific site and crop properties may contribute to a better allocation of fertilizer among management zones (MZ). The aim of this study was to develop a model for diagnosis of N availability and recommendation of N
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dc.contributor.author | Gregoret, María Celeste | |
dc.contributor.author | Diaz Zorita, Martin | |
dc.contributor.author | Dardanelli, Julio Luis | |
dc.contributor.author | Bongiovanni, Rodolfo | |
dc.date.accessioned | 2019-08-16T13:43:00Z | |
dc.date.available | 2019-08-16T13:43:00Z | |
dc.date.issued | 2011-12 | |
dc.identifier.issn | 1385-2256 | |
dc.identifier.issn | 1573-1618 | |
dc.identifier.other | https://doi.org/10.1007/s11119-011-9224-7 | |
dc.identifier.uri | https://link.springer.com/article/10.1007/s11119-011-9224-7 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12123/5641 | |
dc.description.abstract | In semi-arid regions, soil water and nitrogen (N) are generally limiting factors for corn (Zea mays L.) production; hence, implementation of appropriate N fertilization strategies is needed. The use of precision agriculture practices based on specific site and crop properties may contribute to a better allocation of fertilizer among management zones (MZ). The aim of this study was to develop a model for diagnosis of N availability and recommendation of N fertilizer rates adjusted to MZ for dryland corn crops growing in Haplustolls. The model considered variability between MZ by including site-specific variables [soil available water content at sowing (SAW) and Available Nitrogen (soil available N-NO3 at planting + applied N, Nd)] using spatial statistical analysis. The study was conducted in Córdoba, Argentina in Haplustolls and consisted in four field trials of N fertilizer (range 0–161 kg N ha−1) in each MZ. The MZ were selected based on elevation maps analysis. Grain yields varied between MZ and increased with larger SAW and Nd at sowing. Grain responses to Nd and SAW in any MZ were not different between sites, allowing to fit a regional model whose parameters (Nd, Nd2, SAW, SAW2) contributed significantly (p < 0.001) to yield prediction. Agronomical and economically optimum N rates varied among MZs. However, the spatial variability of optimum N rates among MZs within sites was not enough to recommend variable N fertilizer rates instead of a uniform rate. Variable N fertilizer rates should be recommended only if variability in SAW and soil N among MZ is greater than that found in this work. | eng |
dc.format | application/pdf | es_AR |
dc.language.iso | eng | es_AR |
dc.publisher | Springer | es_AR |
dc.rights | info:eu-repo/semantics/restrictedAccess | es_AR |
dc.source | Precision Agriculture 12 : 831 (December 2011) | es_AR |
dc.subject | Aplicación de Abonos | es_AR |
dc.subject | Fertilizer Application | eng |
dc.subject | Abonos Nitrogenados | es_AR |
dc.subject | Nitrogen Fertilizers | eng |
dc.subject | Tipos de Suelos | es_AR |
dc.subject | Soil Types | eng |
dc.subject | Site Specific Nutrient Management | eng |
dc.subject | Maíz | es_AR |
dc.subject | Maize | eng |
dc.subject | Cultivo de Temporal | es_AR |
dc.subject | Rainfed Farming | eng |
dc.subject.other | Haplustolls | eng |
dc.subject.other | Haplustoles | es_AR |
dc.subject.other | Fertilización NItrogenada | es_AR |
dc.subject.other | Región Pampeana | es_AR |
dc.title | Regional model for nitrogen fertilization of site-specific rainfed corn in haplustolls of the central Pampas, Argentina | es_AR |
dc.type | info:ar-repo/semantics/artículo | es_AR |
dc.type | info:eu-repo/semantics/article | es_AR |
dc.type | info:eu-repo/semantics/publishedVersion | es_AR |
dc.description.origen | EEA Manfredi | es_AR |
dc.description.fil | Fil: Gregoret, María Celeste. Asociación Argentina de Consorcios Regionales de Experimentación Agrícola; Argentina | es_AR |
dc.description.fil | Fil: Diaz Zorita, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Agronomía; Argentina. Merck Crop Bioscience Argentina; Argentina | es_AR |
dc.description.fil | Fil: Dardanelli, Julio Luis. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina | es_AR |
dc.description.fil | Fil: Bongiovanni, Rodolfo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina | es_AR |
dc.subtype | cientifico |
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