{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/21542"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/21542","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Growth analysis of soybean in differing row widths","abstract":"To study the effect of row width on the growth of soybean (Glycine max (L.) Merrill), an experiment was conducted at the South Farm of the University of Illinois at Urbana-Champaign during 1992 and 1993. The soybean cultivar Elgin (Group II) was planted at 180,000 and 250,000 plants per hectare in 1992 and 1993 respectively, in 38, 76, 114 and 152 cm apart rows, in a RCB design with nine replications. At about weekly intervals, samples from each experimental unit were examined for leaf area (LA), leaf weight (LW), stem weight (SW), pod weight, yellow leaf weight and developmental stage. Plant height, branches per plant, pods per plant, and yield data were recorded at maturity. Protein content and percent oil of the seed were also determined.","abstract_html":"To study the effect of row width on the growth of soybean (Glycine max (L.) Merrill), an experiment was conducted at the South Farm of the University of Illinois at Urbana-Champaign during 1992 and 1993. The soybean cultivar Elgin (Group II) was planted at 180,000 and 250,000 plants per hectare in 1992 and 1993 respectively, in 38, 76, 114 and 152 cm apart rows, in a RCB design with nine replications. At about weekly intervals, samples from each experimental unit were examined for leaf area (LA), leaf weight (LW), stem weight (SW), pod weight, yellow leaf weight and developmental stage. Plant height, branches per plant, pods per plant, and yield data were recorded at maturity. Protein content and percent oil of the seed were also determined.","abstract_has_math":false,"creators":["Khan, Sajjad"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Crop Sciences","degree_department":null,"school":null,"contributors":["Bullock, Donald G."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:11:42Z","date_published":"2011-05-07T13:11:42Z","updated_at":"2026-07-22T22:25:18Z","subjects":["Agriculture, Agronomy"],"languages":["eng"],"rights":["Copyright 1994 Khan, Sajjad"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9512425","(UMI)AAI9512425"],"render_values":[{"text":"AAI9512425","href":null,"code":true},{"text":"(UMI)AAI9512425","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/21542","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Bullock, Donald G."]},{"key":"dc:creator","label":"Author","values":["Khan, Sajjad"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:11:42Z","10000-01-01","1994"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Crop Sciences"]},{"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"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1994 Khan, Sajjad"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9512425","(UMI)AAI9512425","http://hdl.handle.net/2142/21542"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["To study the effect of row width on the growth of soybean (Glycine max (L.) Merrill), an experiment was conducted at the South Farm of the University of Illinois at Urbana-Champaign during 1992 and 1993. The soybean cultivar Elgin (Group II) was planted at 180,000 and 250,000 plants per hectare in 1992 and 1993 respectively, in 38, 76, 114 and 152 cm apart rows, in a RCB design with nine replications. At about weekly intervals, samples from each experimental unit were examined for leaf area (LA), leaf weight (LW), stem weight (SW), pod weight, yellow leaf weight and developmental stage. Plant height, branches per plant, pods per plant, and yield data were recorded at maturity. Protein content and percent oil of the seed were also determined.","Quadratic, cubic, Monomolecular, Logistic, Gompertz, and Richards functions were compared. Although none of these functions were significantly different, the Logistic function was used, to describe the plant dry biomass (BM) data and cubic function was used for the rest of the growth variables. Growth analysis showed that BM, biomass duration, vegetative biomass, vegetative biomass duration, LA or leaf area index (LAI), leaf area duration, LW, SW, and leaf area ratio increased with decreasing row width. Crop growth rate (CGR) was greater up to the mid season but then lesser later in the season for narrow rows. Relative growth rate, net assimilation rate (NAR), and pods per plant decreased with decreasing row width. Leaf weight ratio first increased, but at mid season it decreased and then again increased at the end of the season, for narrow rows. Specific leaf area was lower in the beginning but then increased later with decreasing row width. Seed yield, plant height, branches per plant and harvest index increased with decreasing row width. The increased yield and CGR were accompanied by, and probably a result of, an increased LAI rather than changes in NAR. About 21% oil and 35% protein were found in seed and no differences were found for different row spaces.","Made available in DSpace on 2011-05-07T13:11:42Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9512425.pdf: 3701474 bytes, checksum: dc7c93a36de56289beac848966e01c10 (MD5) Previous issue date: 1994","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:51:29Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:23:38-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Growth analysis of soybean in differing row widths"]}]}],"canonical_facts":{"dc:contributor":["Bullock, Donald G."],"dc:creator":["Khan, Sajjad"],"dc:date":["2011-05-07T13:11:42Z","10000-01-01","1994"],"dc:description":["To study the effect of row width on the growth of soybean (Glycine max (L.) Merrill), an experiment was conducted at the South Farm of the University of Illinois at Urbana-Champaign during 1992 and 1993. The soybean cultivar Elgin (Group II) was planted at 180,000 and 250,000 plants per hectare in 1992 and 1993 respectively, in 38, 76, 114 and 152 cm apart rows, in a RCB design with nine replications. At about weekly intervals, samples from each experimental unit were examined for leaf area (LA), leaf weight (LW), stem weight (SW), pod weight, yellow leaf weight and developmental stage. Plant height, branches per plant, pods per plant, and yield data were recorded at maturity. Protein content and percent oil of the seed were also determined.","Quadratic, cubic, Monomolecular, Logistic, Gompertz, and Richards functions were compared. Although none of these functions were significantly different, the Logistic function was used, to describe the plant dry biomass (BM) data and cubic function was used for the rest of the growth variables. Growth analysis showed that BM, biomass duration, vegetative biomass, vegetative biomass duration, LA or leaf area index (LAI), leaf area duration, LW, SW, and leaf area ratio increased with decreasing row width. Crop growth rate (CGR) was greater up to the mid season but then lesser later in the season for narrow rows. Relative growth rate, net assimilation rate (NAR), and pods per plant decreased with decreasing row width. Leaf weight ratio first increased, but at mid season it decreased and then again increased at the end of the season, for narrow rows. Specific leaf area was lower in the beginning but then increased later with decreasing row width. Seed yield, plant height, branches per plant and harvest index increased with decreasing row width. The increased yield and CGR were accompanied by, and probably a result of, an increased LAI rather than changes in NAR. About 21% oil and 35% protein were found in seed and no differences were found for different row spaces.","Made available in DSpace on 2011-05-07T13:11:42Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9512425.pdf: 3701474 bytes, checksum: dc7c93a36de56289beac848966e01c10 (MD5) Previous issue date: 1994","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:51:29Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:23:38-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9512425","(UMI)AAI9512425","http://hdl.handle.net/2142/21542"],"dc:language":["eng"],"dc:rights":["Copyright 1994 Khan, Sajjad"],"dc:subject":["Agriculture, Agronomy"],"dc:title":["Growth analysis of soybean in differing row widths"],"dc:type":["text"],"thesis:degree_discipline":["Crop Sciences"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:18Z"}