{"id":"https://openalex.org/W277093293","doi":"https://doi.org/10.1080/00128325.1980.11663053","title":"Effect of Nitrogen Fertilization and Harvesting Time on Sunflower Yield and Hollow Seededness","display_name":"Effect of Nitrogen Fertilization and Harvesting Time on Sunflower Yield and Hollow Seededness","publication_year":1980,"publication_date":"1980-01-01","ids":{"openalex":"https://openalex.org/W277093293","doi":"https://doi.org/10.1080/00128325.1980.11663053","mag":"277093293"},"language":"en","primary_location":{"id":"doi:10.1080/00128325.1980.11663053","doi":"https://doi.org/10.1080/00128325.1980.11663053","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00128325.1980.11663053","pdf_url":null,"source":{"id":"https://openalex.org/S2764848868","display_name":"East African Agricultural and Forestry Journal","issn_l":"0012-8325","issn":["0012-8325","2313-450X"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"East African Agricultural and Forestry Journal","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5089993147","display_name":"E. A. Ogunremi","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4405260560","display_name":"Institute of Agricultural Research and Training","ror":"https://ror.org/03yprjh44","country_code":"NG","type":"facility","lineage":["https://openalex.org/I4405260560"]},{"id":"https://openalex.org/I45711476","display_name":"Obafemi Awolowo University","ror":"https://ror.org/04snhqa82","country_code":"NG","type":"education","lineage":["https://openalex.org/I45711476"]}],"countries":["NG"],"is_corresponding":true,"raw_author_name":"E. A. Ogunremi","raw_affiliation_strings":["Institute of Agricultural Research and Training, University of Ife, P. M. B. 5029, Moor Plantation, Ibadan, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Agricultural Research and Training, University of Ife, P. M. B. 5029, Moor Plantation, Ibadan, Nigeria","institution_ids":["https://openalex.org/I4405260560","https://openalex.org/I45711476"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5089993147"],"corresponding_institution_ids":["https://openalex.org/I4405260560","https://openalex.org/I45711476"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"45","issue":"3","first_page":"236","last_page":"241"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12742","display_name":"Sunflower and Safflower Cultivation","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T12742","display_name":"Sunflower and Safflower Cultivation","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1110","display_name":"Plant Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12310","display_name":"Crop Yield and Soil Fertility","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1102","display_name":"Agronomy and Crop Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/sunflower","display_name":"sunflower","score":0.9900000095367432},{"id":"https://openalex.org/keywords/nitrogen-fertilization","display_name":"nitrogen fertilization","score":0.9940000176429749},{"id":"https://openalex.org/keywords/harvest-timing","display_name":"harvest time","score":0.8870000243186951},{"id":"https://openalex.org/keywords/seed-yield","display_name":"seed yield","score":0.718999981880188},{"id":"https://openalex.org/keywords/seed-set","display_name":"seed set","score":0.4620000123977661}],"concepts":[{"id":"https://openalex.org/C2779197568","wikidata":"https://www.wikidata.org/wiki/Q423986","display_name":"Sunflower","level":2,"score":0.8748000860214233},{"id":"https://openalex.org/C134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","level":2,"score":0.7656174898147583},{"id":"https://openalex.org/C88972607","wikidata":"https://www.wikidata.org/wiki/Q2666904","display_name":"Human fertilization","level":2,"score":0.7654938697814941},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.6936768293380737},{"id":"https://openalex.org/C537208039","wikidata":"https://www.wikidata.org/wiki/Q627","display_name":"Nitrogen","level":2,"score":0.6529116630554199},{"id":"https://openalex.org/C2993605384","wikidata":"https://www.wikidata.org/wiki/Q83323","display_name":"Nitrogen fertilizer","level":3,"score":0.4519094228744507},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.42544203996658325},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.29166170954704285},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.15283769369125366},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.06164872646331787},{"id":"https://openalex.org/C2780560099","wikidata":"https://www.wikidata.org/wiki/Q83323","display_name":"Fertilizer","level":2,"score":0.04829239845275879},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C191897082","wikidata":"https://www.wikidata.org/wiki/Q11467","display_name":"Metallurgy","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1080/00128325.1980.11663053","doi":"https://doi.org/10.1080/00128325.1980.11663053","is_oa":false,"landing_page_url":"https://doi.org/10.1080/00128325.1980.11663053","pdf_url":null,"source":{"id":"https://openalex.org/S2764848868","display_name":"East African Agricultural and Forestry Journal","issn_l":"0012-8325","issn":["0012-8325","2313-450X"],"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310320547","host_organization_name":"Taylor & Francis","host_organization_lineage":["https://openalex.org/P4310320547","https://openalex.org/P4310320449"],"host_organization_lineage_names":["Taylor & Francis","Informa"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"East African Agricultural and Forestry Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger","score":1.0}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":1,"referenced_works":["https://openalex.org/W2271138808"],"related_works":["https://openalex.org/W2084879394","https://openalex.org/W2796390479","https://openalex.org/W2775822934","https://openalex.org/W2117774406","https://openalex.org/W7099851568","https://openalex.org/W2982650513","https://openalex.org/W2691368355","https://openalex.org/W813382068","https://openalex.org/W233931764","https://openalex.org/W820203408"],"abstract_inverted_index":null,"counts_by_year":[{"year":2012,"cited_by_count":1}],"updated_date":"2026-09-22T17:25:34.749102","created_date":"2016-06-24T00:00:00"}
