An Approach to Using Labile Soil Nitrogen Measurements for Calibration of the Dssat-Century Agroecosystem Model for Site-Specific Nitrogen Fertilizer Management in Illinois, Unites States
Kwon, Ho-Young
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Permalink
https://hdl.handle.net/2142/83117
Description
Title
An Approach to Using Labile Soil Nitrogen Measurements for Calibration of the Dssat-Century Agroecosystem Model for Site-Specific Nitrogen Fertilizer Management in Illinois, Unites States
Author(s)
Kwon, Ho-Young
Issue Date
2006
Doctoral Committee Chair(s)
Hudson, Robert J.M.
Department of Study
Natural Resrouces and Environmental Sciences
Discipline
Natural Resrouces and Environmental Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Soil Science
Language
eng
Abstract
Finally, the DSSAT-CENTURY was employed to investigate whether it was possible to develop relationships between the modeled variables and soil N fractions as the ISNT. If such relationships can be identified, it should be possible to use site-specific measurements of soil N fractions to better predict crop responses to fertilizer applications. Although it was possible to obtain reasonably good fits to N response trials, it became clearly that further calibration of leaching and nitrification/denitrification must be accomplished before it becomes practical to predict N response to fertilizer additions.
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