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|Title:||Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)|
|Author(s):||Pitts, Marvin Joseph|
|Department / Program:||Agricultural Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Abstract:||A digital control system for agricultural field sprayers was designed using bypass nozzles to minimize changes in spray pattern and drop size. Sprayer travel speed and the organic matter in the soil under the sprayer were the design inputs. Step, impulse and sinusoidal demands on the system were made and the resulting flows observed. A transfer function between bypass pressure and bypass flow was sought.
Sensors to detect soil organic matter content were needed. Two light reflectance soil organic matter sensors were designed and evaluated using 30 typical Illinois soils. One sensor, based on the change in the slopes of the power curve of reflected light at two wavelengths was found ineffective. The other, based on the primary colors, red and green, and on unfiltered light, predicted soil organic matter content.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983.
|Date Available in IDEALS:||2014-12-16|
This item appears in the following Collection(s)
Dissertations and Theses - Agricultural and Biological Engineering
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois