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GEOPHYSICAL RESEARCH LETTERS,
VOL. 32,
L08403,
4 PP., 2005
doi:10.1029/2005GL022688
Remote estimation of canopy chlorophyll content in crops
Center for Advanced Land Management Information Technologies (CALMIT), University of Nebraska-Lincoln, Lincoln, Nebraska, USA
Center for Advanced Land Management Information Technologies (CALMIT), University of Nebraska-Lincoln, Lincoln, Nebraska, USA
Center for Advanced Land Management Information Technologies (CALMIT), University of Nebraska-Lincoln, Lincoln, Nebraska, USA
Center for Advanced Land Management Information Technologies (CALMIT), University of Nebraska-Lincoln, Lincoln, Nebraska, USA
Department of Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
Accurate estimation of spatially distributed chlorophyll content (Chl) in crops is of great importance for regional and global studies of carbon balance and responses to fertilizer (e.g., nitrogen) application. In this paper a recently developed conceptual model was applied for remotely estimating Chl in maize and soybean canopies. We tuned the spectral regions to be included in the model, according to the optical characteristics of the crops studied, and showed that the developed technique allowed accurate estimation of total Chl in both crops, explaining more than 92% of Chl variation. This new technique shows great potential for remotely tracking the physiological status of crops, with contrasting canopy architectures, and their responses to environmental changes.
Received 10 February 2005; accepted 30 March 2005; published 22 April 2005.
Citation: (2005), Remote estimation of canopy chlorophyll content in crops, Geophys. Res. Lett., 32, L08403, doi:10.1029/2005GL022688.
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