{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/70953"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/70953","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)","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.","abstract_html":"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.","abstract_has_math":false,"creators":["Pitts, Marvin Joseph"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Agricultural Engineering","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T04:46:29Z","date_published":"2014-12-16T04:46:29Z","updated_at":"2026-07-22T22:26:03Z","subjects":["Engineering, Agricultural"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8410022"],"render_values":[{"text":"(UMI)AAI8410022","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/70953","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Pitts, Marvin Joseph"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T04:46:29Z","10000-01-01","1983"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agricultural Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Engineering, Agricultural"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/70953","(UMI)AAI8410022"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["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.","Made available in DSpace on 2014-12-16T04:46:29Z (GMT). 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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.","Made available in DSpace on 2014-12-16T04:46:29Z (GMT). No. of bitstreams: 1 8410022.pdf: 4861192 bytes, checksum: 8736051802f6ea2a016e43d5ab4e697d (MD5) Previous issue date: 1983","Embargo set by: Seth Robbins for item 71119 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","188 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983."],"dc:identifier":["http://hdl.handle.net/2142/70953","(UMI)AAI8410022"],"dc:subject":["Engineering, Agricultural"],"dc:title":["Control of Herbicide Sprayers With Soil Organic Matter as an Input (Illinois)"],"dc:type":["text"],"thesis:degree_discipline":["Agricultural Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:03Z"}