{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/78727"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/78727","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Agronomic and nutritional considerations for increased soybean productivity","abstract":"Increasing soybean [Glycine max (L.) Merr.] productivity will require a comprehensive understanding of the agronomic, nutritional, and genetic factors that influence soybean yield. Despite recent agricultural innovations, there is a common perception that soybean yields have reached a plateau. While most producers overlook the fertility needs of soybean, others believe that improved nutritional management may hold promise for improving soybean productivity. The synergy between adequate nutrient availability in combination with complementary agronomic practices, may be necessary to realize the genetic yield potential of soybean. For these reasons, the objective of this research was to quantify how agronomic and nutritional management practices can be employed to improve soybean productivity which encompasses four research areas: What are the nutritional needs of current soybean cultivars which frequently realize higher yields now than ever before? Research was conducted to quantify the macro- and micronutrient needs of modern soybean cultivars. Nutrients exhibited variation in their uptake, partitioning, and remobilization and presented data should be considered relevant for producers who target or achieve a yield level of 3500 kg ha-1 or higher. Current soybean varieties also exhibited greater dry weight harvest index values relative to previous research which has concomitantly influenced the rate, duration, and partitioning of nutrient accumulation in soybean. Collectively, these findings emphasize the importance of season-long nutrient availability to most effectively meet soybean fertility needs. Can management practices be designed to supply these nutritional needs and achieve improved soybean productivity? Quantification of soybean fertility needs highlighted the importance of phosphate availability, and when supplied as one of five categorical management factors, significant yield increases were realized. Other factors including variety selection, seed treatment, foliar fungicide and insecticide use, and row spacing configuration contributed to improved soybean productivity across a range of environments. An additional study provided in-season applications of N, K, and S using a subsurface drip irrigation (SDI) system and improved seed yield by as much as 357 kg ha-1. Do other agronomic decisions such as variety selection influence the responsiveness to nutrient supply? Results indicated that variety selection significantly influences the outcome of nutritional and agronomic treatments. The value of fertilization, foliar fungicide and insecticide, and seed treatment practices were as much as two-fold greater when applied to fuller season varieties. Additional findings determined that varietal selection cannot be based on RM alone and that classifying varieties based on their responsiveness to nutrient supply was predictive of their response to supplemental agronomic management. What physiological basis exists to support these management-induced productivity improvements? Soybean’s indeterminate growth habit and compensatory nature between yield components emphasize the complexity of yield determination in soybean. As a result, a more thorough understanding of seed number and seed mass establishment was conducted within the canopy to identify how source and/or sink related factors may limit yield. Fertilization and foliar leaf protection treatments significantly improved yield through different, canopy-dependent, yield component strategies. Responses differed among cultivars which underscore the importance of variety selection and agronomic management as a concerted effort for improved soybean productivity.","abstract_html":"Increasing soybean [Glycine max (L.) Merr.] productivity will require a comprehensive understanding of the agronomic, nutritional, and genetic factors that influence soybean yield. Despite recent agricultural innovations, there is a common perception that soybean yields have reached a plateau. While most producers overlook the fertility needs of soybean, others believe that improved nutritional management may hold promise for improving soybean productivity. The synergy between adequate nutrient availability in combination with complementary agronomic practices, may be necessary to realize the genetic yield potential of soybean. For these reasons, the objective of this research was to quantify how agronomic and nutritional management practices can be employed to improve soybean productivity which encompasses four research areas: What are the nutritional needs of current soybean cultivars which frequently realize higher yields now than ever before? Research was conducted to quantify the macro- and micronutrient needs of modern soybean cultivars. Nutrients exhibited variation in their uptake, partitioning, and remobilization and presented data should be considered relevant for producers who target or achieve a yield level of 3500 kg ha-1 or higher. Current soybean varieties also exhibited greater dry weight harvest index values relative to previous research which has concomitantly influenced the rate, duration, and partitioning of nutrient accumulation in soybean. Collectively, these findings emphasize the importance of season-long nutrient availability to most effectively meet soybean fertility needs. Can management practices be designed to supply these nutritional needs and achieve improved soybean productivity? Quantification of soybean fertility needs highlighted the importance of phosphate availability, and when supplied as one of five categorical management factors, significant yield increases were realized. Other factors including variety selection, seed treatment, foliar fungicide and insecticide use, and row spacing configuration contributed to improved soybean productivity across a range of environments. An additional study provided in-season applications of N, K, and S using a subsurface drip irrigation (SDI) system and improved seed yield by as much as 357 kg ha-1. Do other agronomic decisions such as variety selection influence the responsiveness to nutrient supply? Results indicated that variety selection significantly influences the outcome of nutritional and agronomic treatments. The value of fertilization, foliar fungicide and insecticide, and seed treatment practices were as much as two-fold greater when applied to fuller season varieties. Additional findings determined that varietal selection cannot be based on RM alone and that classifying varieties based on their responsiveness to nutrient supply was predictive of their response to supplemental agronomic management. What physiological basis exists to support these management-induced productivity improvements? Soybean’s indeterminate growth habit and compensatory nature between yield components emphasize the complexity of yield determination in soybean. As a result, a more thorough understanding of seed number and seed mass establishment was conducted within the canopy to identify how source and/or sink related factors may limit yield. Fertilization and foliar leaf protection treatments significantly improved yield through different, canopy-dependent, yield component strategies. Responses differed among cultivars which underscore the importance of variety selection and agronomic management as a concerted effort for improved soybean productivity.","abstract_has_math":false,"creators":["Bender, Ross Randall"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Crop Sciences","degree_department":null,"school":null,"contributors":["Below, Frederick E.","Bradley, Carl A.","Mulvaney, Richard L.","Nafziger, Emerson D."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-07-22T22:45:13Z","date_published":"2015-07-22T22:45:13Z","updated_at":"2026-07-22T22:26:12Z","subjects":["soybean","nutrient uptake","agronomic management","productivity","irrigation"],"languages":["en"],"rights":["Copyright 2015 Ross Bender"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/78727","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Below, Frederick E.","Bradley, Carl A.","Mulvaney, Richard L.","Nafziger, Emerson D."]},{"key":"dc:creator","label":"Author","values":["Bender, Ross Randall"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-07-22T22:45:13Z","2017-07-23T09:15:24Z","2015-05","2015-04-20","2015-5"]},{"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":["soybean","nutrient uptake","agronomic management","productivity","irrigation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2015 Ross Bender"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/78727"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Increasing soybean [Glycine max (L.) Merr.] productivity will require a comprehensive understanding of the agronomic, nutritional, and genetic factors that influence soybean yield. Despite recent agricultural innovations, there is a common perception that soybean yields have reached a plateau. While most producers overlook the fertility needs of soybean, others believe that improved nutritional management may hold promise for improving soybean productivity. The synergy between adequate nutrient availability in combination with complementary agronomic practices, may be necessary to realize the genetic yield potential of soybean. For these reasons, the objective of this research was to quantify how agronomic and nutritional management practices can be employed to improve soybean productivity which encompasses four research areas: What are the nutritional needs of current soybean cultivars which frequently realize higher yields now than ever before? Research was conducted to quantify the macro- and micronutrient needs of modern soybean cultivars. Nutrients exhibited variation in their uptake, partitioning, and remobilization and presented data should be considered relevant for producers who target or achieve a yield level of 3500 kg ha-1 or higher. Current soybean varieties also exhibited greater dry weight harvest index values relative to previous research which has concomitantly influenced the rate, duration, and partitioning of nutrient accumulation in soybean. Collectively, these findings emphasize the importance of season-long nutrient availability to most effectively meet soybean fertility needs. Can management practices be designed to supply these nutritional needs and achieve improved soybean productivity? Quantification of soybean fertility needs highlighted the importance of phosphate availability, and when supplied as one of five categorical management factors, significant yield increases were realized. Other factors including variety selection, seed treatment, foliar fungicide and insecticide use, and row spacing configuration contributed to improved soybean productivity across a range of environments. An additional study provided in-season applications of N, K, and S using a subsurface drip irrigation (SDI) system and improved seed yield by as much as 357 kg ha-1. Do other agronomic decisions such as variety selection influence the responsiveness to nutrient supply? Results indicated that variety selection significantly influences the outcome of nutritional and agronomic treatments. The value of fertilization, foliar fungicide and insecticide, and seed treatment practices were as much as two-fold greater when applied to fuller season varieties. Additional findings determined that varietal selection cannot be based on RM alone and that classifying varieties based on their responsiveness to nutrient supply was predictive of their response to supplemental agronomic management. What physiological basis exists to support these management-induced productivity improvements? Soybean’s indeterminate growth habit and compensatory nature between yield components emphasize the complexity of yield determination in soybean. As a result, a more thorough understanding of seed number and seed mass establishment was conducted within the canopy to identify how source and/or sink related factors may limit yield. Fertilization and foliar leaf protection treatments significantly improved yield through different, canopy-dependent, yield component strategies. Responses differed among cultivars which underscore the importance of variety selection and agronomic management as a concerted effort for improved soybean productivity.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2017-05-01","The student, Ross Bender, accepted the attached license on 2015-04-10 at 13:53.","The student, Ross Bender, submitted this Dissertation for approval on 2015-04-10 at 14:01.","This Dissertation was approved for publication on 2015-04-20 at 11:41.","DSpace SAF Submission Ingestion Package generated from Vireo submission #7816 on 2015-07-22 at 14:24:20","Made available in DSpace on 2015-07-22T22:45:13Z (GMT). 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Merr.] productivity will require a comprehensive understanding of the agronomic, nutritional, and genetic factors that influence soybean yield. Despite recent agricultural innovations, there is a common perception that soybean yields have reached a plateau. While most producers overlook the fertility needs of soybean, others believe that improved nutritional management may hold promise for improving soybean productivity. The synergy between adequate nutrient availability in combination with complementary agronomic practices, may be necessary to realize the genetic yield potential of soybean. For these reasons, the objective of this research was to quantify how agronomic and nutritional management practices can be employed to improve soybean productivity which encompasses four research areas: What are the nutritional needs of current soybean cultivars which frequently realize higher yields now than ever before? Research was conducted to quantify the macro- and micronutrient needs of modern soybean cultivars. Nutrients exhibited variation in their uptake, partitioning, and remobilization and presented data should be considered relevant for producers who target or achieve a yield level of 3500 kg ha-1 or higher. Current soybean varieties also exhibited greater dry weight harvest index values relative to previous research which has concomitantly influenced the rate, duration, and partitioning of nutrient accumulation in soybean. Collectively, these findings emphasize the importance of season-long nutrient availability to most effectively meet soybean fertility needs. Can management practices be designed to supply these nutritional needs and achieve improved soybean productivity? Quantification of soybean fertility needs highlighted the importance of phosphate availability, and when supplied as one of five categorical management factors, significant yield increases were realized. Other factors including variety selection, seed treatment, foliar fungicide and insecticide use, and row spacing configuration contributed to improved soybean productivity across a range of environments. An additional study provided in-season applications of N, K, and S using a subsurface drip irrigation (SDI) system and improved seed yield by as much as 357 kg ha-1. Do other agronomic decisions such as variety selection influence the responsiveness to nutrient supply? Results indicated that variety selection significantly influences the outcome of nutritional and agronomic treatments. The value of fertilization, foliar fungicide and insecticide, and seed treatment practices were as much as two-fold greater when applied to fuller season varieties. Additional findings determined that varietal selection cannot be based on RM alone and that classifying varieties based on their responsiveness to nutrient supply was predictive of their response to supplemental agronomic management. What physiological basis exists to support these management-induced productivity improvements? Soybean’s indeterminate growth habit and compensatory nature between yield components emphasize the complexity of yield determination in soybean. As a result, a more thorough understanding of seed number and seed mass establishment was conducted within the canopy to identify how source and/or sink related factors may limit yield. Fertilization and foliar leaf protection treatments significantly improved yield through different, canopy-dependent, yield component strategies. Responses differed among cultivars which underscore the importance of variety selection and agronomic management as a concerted effort for improved soybean productivity.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2017-05-01","The student, Ross Bender, accepted the attached license on 2015-04-10 at 13:53.","The student, Ross Bender, submitted this Dissertation for approval on 2015-04-10 at 14:01.","This Dissertation was approved for publication on 2015-04-20 at 11:41.","DSpace SAF Submission Ingestion Package generated from Vireo submission #7816 on 2015-07-22 at 14:24:20","Made available in DSpace on 2015-07-22T22:45:13Z (GMT). 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