Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization
The fraction of the ground covered by a crop (CC) determines both interception of solar radiation and the size of the transpiration apparatus. Besides, the availability of nitrogen (N) in the potato crop (Solanum tuberosum L.) affects the yield and the quality of tubers. Digital procedures for estim...
| Main Authors: | , , , |
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| Format: | Online |
| Language: | spa |
| Published: |
Facultad de Ciencias Agropecuarias
2016
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| Subjects: | |
| Online Access: | https://revistas.unc.edu.ar/index.php/agris/article/view/16575 |
| _version_ | 1811172548937777152 |
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| author | de la Casa, A. Ovando, G. Bressanini, L. Martínez, J. |
| author_facet | de la Casa, A. Ovando, G. Bressanini, L. Martínez, J. |
| author_sort | de la Casa, A. |
| collection | Portal de Revistas |
| description | The fraction of the ground covered by a crop (CC) determines both interception of solar radiation and the size of the transpiration apparatus. Besides, the availability of nitrogen (N) in the potato crop (Solanum tuberosum L.) affects the yield and the quality of tubers. Digital procedures for estimating CC in potato from conventional and modified cameras to calculate Normalized Difference Vegetation Index (NDVI) were developed and evaluated under different conditions of nitrogen fertilization in potato commercial fields during the late growing season of 2012 and 2013. In 2012, the CC and the yield of a sector that received no fertilizer at planting were compared to the commercial treatment, while in 2013 four treatments with different doses of N were considered. Both cameras, as well as the procedures for estimating CC, rendered appropriate results to indicate significant differences in CC related to fertilization status in 2012. While the lower fertilization in 2012 produced an early decrease of CC at the end of the growing season reducing both productivity and commercial quality of tubers, in 2013 the CC and yield differences between treatments were less significant. |
| format | Online |
| id | oai:ojs.revistas.unc.edu.ar:article-16575 |
| institution | Universidad Nacional de Cordoba |
| language | spa |
| publishDate | 2016 |
| publisher | Facultad de Ciencias Agropecuarias |
| record_format | ojs |
| spelling | oai:ojs.revistas.unc.edu.ar:article-165752020-02-13T20:46:19Z Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization Empleo del NDVI de una cámara digital modificada para estimar la cobertura del cultivo de papa bajo distintas condiciones de fertilización nitrogenada de la Casa, A. Ovando, G. Bressanini, L. Martínez, J. Solanum tuberosum L. cámara digital fertilización teledetección. Solanum tuberosum L. digital camera fertilization remote sensing. The fraction of the ground covered by a crop (CC) determines both interception of solar radiation and the size of the transpiration apparatus. Besides, the availability of nitrogen (N) in the potato crop (Solanum tuberosum L.) affects the yield and the quality of tubers. Digital procedures for estimating CC in potato from conventional and modified cameras to calculate Normalized Difference Vegetation Index (NDVI) were developed and evaluated under different conditions of nitrogen fertilization in potato commercial fields during the late growing season of 2012 and 2013. In 2012, the CC and the yield of a sector that received no fertilizer at planting were compared to the commercial treatment, while in 2013 four treatments with different doses of N were considered. Both cameras, as well as the procedures for estimating CC, rendered appropriate results to indicate significant differences in CC related to fertilization status in 2012. While the lower fertilization in 2012 produced an early decrease of CC at the end of the growing season reducing both productivity and commercial quality of tubers, in 2013 the CC and yield differences between treatments were less significant. La fracción del suelo cubierta por el cultivo (CC) determina tanto la intercepción de radiación solar como el tamaño del aparato transpiratorio. Asimismo, la disponibilidad de nitrógeno (N) en papa (Solanum tuberosum L.) afecta el rendimiento y la calidad de los tubérculos. Este trabajo desarrolla procedimientos digitales para estimar la CC en papa usando imágenes fotográficas de cámaras convencionales y modificadas para obtener datos del índice de vegetación de la diferencia normalizada (NDVI), evaluados bajo distintas condiciones de fertilización nitrogenada en cultivos de ciclo tardío en 2012 y 2013. En 2012 se comparó la CC y rendimiento de un sector que no recibió fertilización a la plantación respecto del tratamiento comercial, en tanto que en 2013 se consideraron cuatro tratamientos con distintas dosis de N. Ambas cámaras, como así también los procedimientos para estimar la CC, resultaron apropiados para acusar diferencias significativas en la CC asociadas a la fertilización en 2012. Mientras la menor fertilización en 2012 produjo una disminución anticipada de la CC al final del ciclo, lo que redujo la productividad y la calidad comercial, en 2013 las diferencias de la CC y rendimiento entre tratamientos fueron menos pronunciadas. Facultad de Ciencias Agropecuarias 2016-12-26 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://revistas.unc.edu.ar/index.php/agris/article/view/16575 10.31047/1668.298x.v33.n2.16575 AgriScientia; Vol. 33 No. 2 (2016); 75-88 AgriScientia; Vol. 33 Núm. 2 (2016); 75-88 1668-298X 10.31047/1668.298x.v33.n2 spa https://revistas.unc.edu.ar/index.php/agris/article/view/16575/16383 |
| spellingShingle | Solanum tuberosum L. cámara digital fertilización teledetección. Solanum tuberosum L. digital camera fertilization remote sensing. de la Casa, A. Ovando, G. Bressanini, L. Martínez, J. Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title | Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title_alt | Empleo del NDVI de una cámara digital modificada para estimar la cobertura del cultivo de papa bajo distintas condiciones de fertilización nitrogenada |
| title_full | Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title_fullStr | Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title_full_unstemmed | Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title_short | Using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| title_sort | using ndvi from a modified digital camera to estimate potato crop cover under different conditions of nitrogen fertilization |
| topic | Solanum tuberosum L. cámara digital fertilización teledetección. Solanum tuberosum L. digital camera fertilization remote sensing. |
| topic_facet | Solanum tuberosum L. cámara digital fertilización teledetección. Solanum tuberosum L. digital camera fertilization remote sensing. |
| url | https://revistas.unc.edu.ar/index.php/agris/article/view/16575 |
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