Campbell, Petya EntchevaMiddleton, E.M.Corp, L.A.McMurtrey, J.E.Kim, M.S.Chappelle, E.W.Butcher, L.M.2023-07-132023-07-132005-08-08P. K. E. Campbell et al., "Contribution of chlorophyll fluorescence to the reflectance of corn foliage," IEEE International Geoscience and Remote Sensing Symposium, Toronto, ON, Canada, 2002, pp. 2775-2777 vol.5, doi: 10.1109/IGARSS.2002.1026771.https://doi.org/10.1109/IGARSS.2002.1026771http://hdl.handle.net/11603/28664IEEE International Geoscience and Remote Sensing Symposium, 24-28 June 2002, Toronto, ON, CanadaTo assess the contribution of chlorophyll fluorescence (ChlF) to apparent reflectance (Ra) in the red/far-red, spectra were collected on a C/sub 4/ agricultural species (corn, Zea mays L.) under conditions ranging from nitrogen deficiency to excess. A significant contribution of ChlF to Ra was observed, with on average 10-25% at 685nm and 2-6% at 740nm of Ra being due to ChlF. Higher ChlF was consistently measured from the abaxial leaf surface as compared to the adaxial. Using 350-665nm excitation, the study confirms the trends in three ChlF ratios established previously by active F technology, suggesting that the ChlF utility this technology has developed for monitoring vegetation physiological status is likely applicable also under natural solar illumination.3 pagesen-USThis 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.Public Domain Mark 1.0http://creativecommons.org/publicdomain/mark/1.0/Text