Analysis and Control of Rate and Uniformity for Granular Fertilizer Application Systems
Kweon, Giyoung
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https://hdl.handle.net/2142/86063
Description
Title
Analysis and Control of Rate and Uniformity for Granular Fertilizer Application Systems
Author(s)
Kweon, Giyoung
Issue Date
2006
Doctoral Committee Chair(s)
Grift, Tony E.
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)
Engineering, Agricultural
Language
eng
Abstract
A comparison was made between the spinning tube method discussed in this paper and a rheometer method. In the latter method, the particles are fixed in placeholders, and a spinning disc is kept in contact with them under a controlled normal force. The measured torque on the disc is then a measure for the friction coefficient. Data for the same fertilizer materials Ammonium Nitrate and Potassium Chloride indicated that the rheometer is not a good instrument to obtain friction coefficients with practical value, whereas the data from the spinning tube device is consistent with measured spread patterns. (Abstract shortened by UMI.).
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