@InProceedings{CigandaGite:2011:ReDeUn,
author = "Ciganda, Ver{\'o}nica Solange and Gitelson, Anatoly",
affiliation = "{Instituto Nacional de Investigaci{\'o}n Agropecuaria (INIA)} and
{Center for Advanced Land Management Information Technology
(CALMIT)}",
title = "Effect of the Vertical Profile of Chlorophyll on Maize Canopy
Reflectance: Remote Determination under Field Conditions",
booktitle = "Anais...",
year = "2011",
editor = "Epiphanio, Jos{\'e} Carlos Neves and Galv{\~a}o, L{\^e}nio
Soares",
pages = "638--646",
organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 15. (SBSR).",
publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
address = "S{\~a}o Jos{\'e} dos Campos",
abstract = "The chlorophyll (Chl) content of a crop canopy is a biophysical
variable that quantitatively expresses the photosynthetic capacity
of a vegetation stand and it is related to many important plant
functions and parameters. Therefore, it is not surprising that
many remote sensing studies have focused on the estimation of Chl
content of vegetation canopies to asses the vitality of plants and
to detect vegetation stress. However, there is little information
regarding how the distribution of Chl within vegetation canopies
defines the reflectance signatures measured remotely and the
derived spectral indexes. The goal of this study was to determine
how deep into a maize canopy, a spectral vegetation index, based
on the red edge and NIR spectral bands, senses the Chl content of
individual leaves. Reflectance was measured using a hand-held
radiometer at both the leaf and canopy level in order to retrieve
foliar and total canopy Chl content, respectively. A hierarchical
regression analysis was used to find (i) how many maize leaves
contribute significantly to total canopy Chl content, and (ii) how
many leaves, from top to bottom, are sensed by a field radiometer
and by the red edge chlorophyll index, CIred edge . Results showed
that CIred edge senses the chlorophyll content of the top 7 to 8
leaves in the maize canopy and, thus, is able to accurately
estimate total chlorophyll content in canopy.",
conference-location = "Curitiba",
conference-year = "30 abr. - 5 maio 2011",
isbn = "{978-85-17-00056-0 (Internet)} and {978-85-17-00057-7 (DVD)}",
language = "en",
organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
ibi = "3ERPFQRTRW/39UFGDQ",
url = "http://urlib.net/ibi/3ERPFQRTRW/39UFGDQ",
targetfile = "p0286.pdf",
type = "Agricultura",
urlaccessdate = "04 maio 2024"
}