Real-Time Nitrogen Detection System of Corn Crop Using a Multi -Spectral Imaging Sensor
Kim, Yunseop
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https://hdl.handle.net/2142/86046
Description
Title
Real-Time Nitrogen Detection System of Corn Crop Using a Multi -Spectral Imaging Sensor
Author(s)
Kim, Yunseop
Issue Date
2002
Doctoral Committee Chair(s)
Reid, John F.
Department of Study
Agricultural Engineering
Discipline
Agricultural Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Environmental Sciences
Language
eng
Abstract
Real-time N-deficiency was estimated by using NDVI and mapped relative to unstressed healthy plants. The MSIS system provided a measure of crop response that correlated with plant SPAD measurements (-0.93 for G channel and -0.88 for R channel). The system had smaller measurement variation than the SPAD meter with a standard deviation of 0.13 in MSIS measurements whereas 0.26 in SPAD measurements. The MSIS-based supplemental N treatment improved the crop N status and increased the yield in one case, while in other case no yield improvement was observed with MSIS-based fertilization.
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