{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/87673"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/87673","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Fate and Utilization of Fertilizer in Inbred and Hybrid Corn Production","abstract":"To evaluate the impact of N rate and crop rotation on uptake of fertilizer N in seed corn production, corn inbred lines were grown in corn-corn and corn-soybean (Glycine max L. Merr.) rotations using N application rates of 0 to 144 lb acre$\\sp{-1}$. When corn was the previous crop, seed yield of all increased with increasing N rate in two of three years, with the optimum N rate varying from 68 to 122 lb acre$\\sp{-1}$. Optimum N rates were lower (0 to 96 lb acre$\\sp{-1}$) following soybean than when following corn, and no N response was observed in 5 of 9 cases. Recovery of fertilizer N by inbred corn plants ranged from 30 to 45% of the amount applied and was higher at lower application rates and when soybean was the previous crop. A N fertilizer recommendation, calculated using a factor of 1.2 lb N per bu of proven yield and a 20 lb-acre$\\sp{-1}$ N credit when soybean was the previous crop, provided adequate N for optimum seed production. Loss of fertilizer N ranged from 16% to 32%, with greatest losses occurring with 144 lb N acre$\\sp{-1}$ regardless of rotation. Leaching of NO$\\sb3$-N was detected when N application rates exceeded recommended values.","abstract_html":"To evaluate the impact of N rate and crop rotation on uptake of fertilizer N in seed corn production, corn inbred lines were grown in corn-corn and corn-soybean (Glycine max L. Merr.) rotations using N application rates of 0 to 144 lb acre$\\sp{-1}$. When corn was the previous crop, seed yield of all increased with increasing N rate in two of three years, with the optimum N rate varying from 68 to 122 lb acre$\\sp{-1}$. Optimum N rates were lower (0 to 96 lb acre$\\sp{-1}$) following soybean than when following corn, and no N response was observed in 5 of 9 cases. Recovery of fertilizer N by inbred corn plants ranged from 30 to 45% of the amount applied and was higher at lower application rates and when soybean was the previous crop. A N fertilizer recommendation, calculated using a factor of 1.2 lb N per bu of proven yield and a 20 lb-acre$\\sp{-1}$ N credit when soybean was the previous crop, provided adequate N for optimum seed production. Loss of fertilizer N ranged from 16% to 32%, with greatest losses occurring with 144 lb N acre$\\sp{-1}$ regardless of rotation. Leaching of NO$\\sb3$-N was detected when N application rates exceeded recommended values.","abstract_has_math":true,"creators":["Stevens, William Bart"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Agronomy","degree_department":null,"school":null,"contributors":["Dissertation Abstracts International, Volume"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-28T16:22:34Z","date_published":"2015-09-28T16:22:34Z","updated_at":"2026-07-22T22:26:30Z","subjects":["Agriculture, Agronomy"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9904595"],"render_values":[{"text":"(MiAaPQ)AAI9904595","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/87673","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dissertation Abstracts International, Volume"]},{"key":"dc:creator","label":"Author","values":["Stevens, William Bart"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-28T16:22:34Z","10000-01-01","1998"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agronomy"]},{"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":["Agriculture, Agronomy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/87673","(MiAaPQ)AAI9904595"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["To evaluate the impact of N rate and crop rotation on uptake of fertilizer N in seed corn production, corn inbred lines were grown in corn-corn and corn-soybean (Glycine max L. Merr.) rotations using N application rates of 0 to 144 lb acre$\\sp{-1}$. When corn was the previous crop, seed yield of all increased with increasing N rate in two of three years, with the optimum N rate varying from 68 to 122 lb acre$\\sp{-1}$. Optimum N rates were lower (0 to 96 lb acre$\\sp{-1}$) following soybean than when following corn, and no N response was observed in 5 of 9 cases. Recovery of fertilizer N by inbred corn plants ranged from 30 to 45% of the amount applied and was higher at lower application rates and when soybean was the previous crop. A N fertilizer recommendation, calculated using a factor of 1.2 lb N per bu of proven yield and a 20 lb-acre$\\sp{-1}$ N credit when soybean was the previous crop, provided adequate N for optimum seed production. Loss of fertilizer N ranged from 16% to 32%, with greatest losses occurring with 144 lb N acre$\\sp{-1}$ regardless of rotation. Leaching of NO$\\sb3$-N was detected when N application rates exceeded recommended values.","Made available in DSpace on 2015-09-28T16:22:34Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9904595.pdf: 5237857 bytes, checksum: 20903b73567604f38ab6ca3103f3719c (MD5) Previous issue date: 1998","Embargo set by: Seth Robbins for item 88954 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 indefinitely during batch ingest of legacy ETDs","U of I Only","114 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998."]},{"key":"dc:title","label":"Title","values":["Fate and Utilization of Fertilizer in Inbred and Hybrid Corn Production"]}]}],"canonical_facts":{"dc:contributor":["Dissertation Abstracts International, Volume"],"dc:creator":["Stevens, William Bart"],"dc:date":["2015-09-28T16:22:34Z","10000-01-01","1998"],"dc:description":["To evaluate the impact of N rate and crop rotation on uptake of fertilizer N in seed corn production, corn inbred lines were grown in corn-corn and corn-soybean (Glycine max L. Merr.) rotations using N application rates of 0 to 144 lb acre$\\sp{-1}$. When corn was the previous crop, seed yield of all increased with increasing N rate in two of three years, with the optimum N rate varying from 68 to 122 lb acre$\\sp{-1}$. Optimum N rates were lower (0 to 96 lb acre$\\sp{-1}$) following soybean than when following corn, and no N response was observed in 5 of 9 cases. Recovery of fertilizer N by inbred corn plants ranged from 30 to 45% of the amount applied and was higher at lower application rates and when soybean was the previous crop. A N fertilizer recommendation, calculated using a factor of 1.2 lb N per bu of proven yield and a 20 lb-acre$\\sp{-1}$ N credit when soybean was the previous crop, provided adequate N for optimum seed production. Loss of fertilizer N ranged from 16% to 32%, with greatest losses occurring with 144 lb N acre$\\sp{-1}$ regardless of rotation. Leaching of NO$\\sb3$-N was detected when N application rates exceeded recommended values.","Made available in DSpace on 2015-09-28T16:22:34Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9904595.pdf: 5237857 bytes, checksum: 20903b73567604f38ab6ca3103f3719c (MD5) Previous issue date: 1998","Embargo set by: Seth Robbins for item 88954 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 indefinitely during batch ingest of legacy ETDs","U of I Only","114 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1998."],"dc:identifier":["http://hdl.handle.net/2142/87673","(MiAaPQ)AAI9904595"],"dc:language":["eng"],"dc:subject":["Agriculture, Agronomy"],"dc:title":["Fate and Utilization of Fertilizer in Inbred and Hybrid Corn Production"],"dc:type":["text"],"thesis:degree_discipline":["Agronomy"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:30Z"}