Foliar reflectance and fluorescence responses for plants under nitrogen stress determined with active and passive systems
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Date
2004-05-10
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Citation of Original Publication
E. M. Middleton, J. E. McMurtrey, P. K. E. Campbell, L. A. Corp, L. M. Butcher and E. W. Chapelle, "Foliar reflectance and fluorescence responses for plants under nitrogen stress determined with active and passive systems," IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), Toulouse, France, 2003, pp. 594-597 vol.1, doi: 10.1109/IGARSS.2003.1293853.
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
Leaves of corn (Zea mays L.) and soybean (Glycine max L.) plants were examined in a set of four experiments conducted in the summer of 2001 at USDA in Beltsville, MD. Red edge reflectance spectra and red (R) and far-red (FR) fluorescence emissions were acquired for adaxial and abaxial leaf surfaces, in conjunction with foliar chlorophyll content, photosynthetic capacity (Amax), and C/N ratio. A red edge first derivative ratio was strongly related to chlorophyll content, Amax, and C/N ratio. R/FR fluorescence emission ratios also were related to Amax and C/N levels, and enabled species discrimination.