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Sensors 2010, 10(4), 2843-2850; doi:10.3390/s100402843
Communication

Active Ground Optical Remote Sensing for Improved Monitoring of Seedling Stress in Nurseries

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Received: 5 February 2010 / Revised: 11 March 2010 / Accepted: 24 March 2010 / Published: 29 March 2010
(This article belongs to the Section Remote Sensors)
Download PDF [247 KB, 21 June 2014; original version 21 June 2014]

Abstract

Active ground optical remote sensing (AGORS) devices mounted on overhead irrigation booms could help to improve seedling quality by autonomously monitoring seedling stress. In contrast to traditionally used passive optical sensors, AGORS devices operate independently of ambient light conditions and do not require spectral reference readings. Besides measuring red (590–670 nm) and near-infrared (>760 nm) reflectance AGORS devices have recently become available that also measure red-edge (730 nm) reflectance. We tested the hypothesis that the additional availability of red-edge reflectance information would improve AGORS of plant stress induced chlorophyll breakdown in Scots pine (Pinus sylvestris). Our results showed that the availability of red-edge reflectance information improved AGORS estimates of stress induced variation in chlorophyll concentration (r2 > 0.73, RMSE < 1.69) when compared to those without (r2 = 0.57, RMSE = 2.11).
Keywords: chlorophyll a+b concentration (Chlab); Scots pine (Pinus sylvestris); red-edge; NDRE; NDVI; CCCI; crop sensors chlorophyll a+b concentration (Chlab); Scots pine (Pinus sylvestris); red-edge; NDRE; NDVI; CCCI; crop sensors
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Eitel, J.U.H.; Keefe, R.F.; Long, D.S.; Davis, A.S.; Vierling, L.A. Active Ground Optical Remote Sensing for Improved Monitoring of Seedling Stress in Nurseries. Sensors 2010, 10, 2843-2850.

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