Ground and airborne level optical sensors: is it possible to estimate maize crop N status?

Gabriel Pérez, José Luis and Zarco Tejada, Pablo and Quemada Saenz-Badillos, Miguel (2014). Ground and airborne level optical sensors: is it possible to estimate maize crop N status?. In: "Proceedings of the 18th Nitrogen Workshop", 30/06/2014-03/07/2014, Lisboa, Portugal. ISBN 978-972-8669-56-0. p. 2.

Description

Title: Ground and airborne level optical sensors: is it possible to estimate maize crop N status?
Author/s:
  • Gabriel Pérez, José Luis
  • Zarco Tejada, Pablo
  • Quemada Saenz-Badillos, Miguel
Item Type: Presentation at Congress or Conference (Other)
Event Title: Proceedings of the 18th Nitrogen Workshop
Event Dates: 30/06/2014-03/07/2014
Event Location: Lisboa, Portugal
Title of Book: The nitrogen challenge: building a blueprint for nitrogen use efficiency and food security
Date: 2014
ISBN: 978-972-8669-56-0
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Adjusting N fertilizer application to crop requirements is a key issue to improve fertilizer efficiency, reducing unnecessary input costs to farmers and N environmental impact. Among the multiple soil and crop tests developed, optical sensors that detect crop N nutritional status may have a large potential to adjust N fertilizer recommendation (Samborski et al. 2009). Optical readings are rapid to take and non-destructive, they can be efficiently processed and combined to obtain indexes or indicators of crop status. However, other physiological stress conditions may interfere with the readings and detection of the best crop nutritional status indicators is not always and easy task. Comparison of different equipments and technologies might help to identify strengths and weakness of the application of optical sensors for N fertilizer recommendation. The aim of this study was to evaluate the potential of various ground-level optical sensors and narrow-band indices obtained from airborne hyperspectral images as tools for maize N fertilizer recommendations. Specific objectives were i) to determine which indices could detect differences in maize plants treated with different N fertilizer rates, and ii) to evaluate its ability to identify N-responsive from non-responsive sites.

More information

Item ID: 36920
DC Identifier: http://oa.upm.es/36920/
OAI Identifier: oai:oa.upm.es:36920
Deposited by: Memoria Investigacion
Deposited on: 23 Jul 2015 14:49
Last Modified: 06 Jun 2016 14:49
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