{"id":"https://openalex.org/W2965242170","doi":"https://doi.org/10.5897/ajps2015.1353","title":"Planting date and cultivar effects on growth and yield performance of cowpea (Vigna unguiculata (L.) Walp)","display_name":"Planting date and cultivar effects on growth and yield performance of cowpea (Vigna unguiculata (L.) Walp)","publication_year":2015,"publication_date":"2015-11-30","ids":{"openalex":"https://openalex.org/W2965242170","doi":"https://doi.org/10.5897/ajps2015.1353","mag":"2965242170"},"language":"en","primary_location":{"id":"doi:10.5897/ajps2015.1353","doi":"https://doi.org/10.5897/ajps2015.1353","is_oa":true,"landing_page_url":"https://doi.org/10.5897/ajps2015.1353","pdf_url":"https://academicjournals.org/journal/AJPS/article-full-text-pdf/C86F90455968","source":{"id":"https://openalex.org/S2764728516","display_name":"African Journal of Plant Science","issn_l":"1996-0824","issn":["1996-0824"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310321074","host_organization_name":"Academic Journals","host_organization_lineage":["https://openalex.org/P4310321074"],"host_organization_lineage_names":["Academic Journals"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"African Journal of Plant Science","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://academicjournals.org/journal/AJPS/article-full-text-pdf/C86F90455968","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5098347371","display_name":"E Ezeaku","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I11892038","display_name":"University of Nigeria","ror":"https://ror.org/01sn1yx84","country_code":"NG","type":"education","lineage":["https://openalex.org/I11892038"]}],"countries":["NG"],"is_corresponding":true,"raw_author_name":"E Ezeaku I","raw_affiliation_strings":["Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria","institution_ids":["https://openalex.org/I11892038"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5009680706","display_name":"N Mbah B","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I11892038","display_name":"University of Nigeria","ror":"https://ror.org/01sn1yx84","country_code":"NG","type":"education","lineage":["https://openalex.org/I11892038"]}],"countries":["NG"],"is_corresponding":false,"raw_author_name":"N Mbah B","raw_affiliation_strings":["Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria","institution_ids":["https://openalex.org/I11892038"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5109908044","display_name":"P Baiyeri K","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I11892038","display_name":"University of Nigeria","ror":"https://ror.org/01sn1yx84","country_code":"NG","type":"education","lineage":["https://openalex.org/I11892038"]}],"countries":["NG"],"is_corresponding":false,"raw_author_name":"P Baiyeri K","raw_affiliation_strings":["Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Crop Science, University of Nigeria, Nsukka, Enugu State, Nigeria","institution_ids":["https://openalex.org/I11892038"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5098347371"],"corresponding_institution_ids":["https://openalex.org/I11892038"],"apc_list":null,"apc_paid":null,"fwci":1.8858,"has_fulltext":true,"cited_by_count":21,"citation_normalized_percentile":{"value":0.84433888,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":87,"max":98},"biblio":{"volume":"9","issue":"11","first_page":"439","last_page":"448"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13125","display_name":"Agricultural pest management studies","score":0.9980000257492065,"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/T13125","display_name":"Agricultural pest management studies","score":0.9980000257492065,"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/T11229","display_name":"Genetics and Plant Breeding","score":0.0012000000569969416,"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/T13628","display_name":"Agricultural Productivity and Crop Improvement","score":9.999999747378752e-05,"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/cowpea","display_name":"cowpea","score":1.0},{"id":"https://openalex.org/keywords/sowing-date","display_name":"sowing date","score":0.9990000128746033},{"id":"https://openalex.org/keywords/cultivar-evaluation","display_name":"cultivar evaluation","score":0.9020000100135803},{"id":"https://openalex.org/keywords/gene-environment-interaction","display_name":"gene-environment interaction","score":0.9129999876022339},{"id":"https://openalex.org/keywords/grain-yield","display_name":"grain yield","score":0.9150000214576721},{"id":"https://openalex.org/keywords/yield-components","display_name":"yield components","score":0.9959999918937683},{"id":"https://openalex.org/keywords/early-sowing","display_name":"early sowing","score":0.49300000071525574},{"id":"https://openalex.org/keywords/broad-adaptation","display_name":"broad adaptation","score":0.6869999766349792},{"id":"https://openalex.org/keywords/southeast-nigeria","display_name":"South-East Nigeria","score":0.7490000128746033}],"concepts":[{"id":"https://openalex.org/C168741863","wikidata":"https://www.wikidata.org/wiki/Q777671","display_name":"Sowing","level":2,"score":0.9482380151748657},{"id":"https://openalex.org/C2779862049","wikidata":"https://www.wikidata.org/wiki/Q132634","display_name":"Vigna","level":2,"score":0.8888020515441895},{"id":"https://openalex.org/C197321923","wikidata":"https://www.wikidata.org/wiki/Q4886","display_name":"Cultivar","level":2,"score":0.7503902316093445},{"id":"https://openalex.org/C134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","level":2,"score":0.6561278104782104},{"id":"https://openalex.org/C2992211155","wikidata":"https://www.wikidata.org/wiki/Q889514","display_name":"Grain yield","level":2,"score":0.6180145740509033},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.5591546297073364},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.5222131013870239},{"id":"https://openalex.org/C144027150","wikidata":"https://www.wikidata.org/wiki/Q48803","display_name":"Horticulture","level":1,"score":0.42310604453086853},{"id":"https://openalex.org/C191897082","wikidata":"https://www.wikidata.org/wiki/Q11467","display_name":"Metallurgy","level":1,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.5897/ajps2015.1353","doi":"https://doi.org/10.5897/ajps2015.1353","is_oa":true,"landing_page_url":"https://doi.org/10.5897/ajps2015.1353","pdf_url":"https://academicjournals.org/journal/AJPS/article-full-text-pdf/C86F90455968","source":{"id":"https://openalex.org/S2764728516","display_name":"African Journal of Plant Science","issn_l":"1996-0824","issn":["1996-0824"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310321074","host_organization_name":"Academic Journals","host_organization_lineage":["https://openalex.org/P4310321074"],"host_organization_lineage_names":["Academic Journals"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"African Journal of Plant Science","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.5897/ajps2015.1353","doi":"https://doi.org/10.5897/ajps2015.1353","is_oa":true,"landing_page_url":"https://doi.org/10.5897/ajps2015.1353","pdf_url":"https://academicjournals.org/journal/AJPS/article-full-text-pdf/C86F90455968","source":{"id":"https://openalex.org/S2764728516","display_name":"African Journal of Plant Science","issn_l":"1996-0824","issn":["1996-0824"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/P4310321074","host_organization_name":"Academic Journals","host_organization_lineage":["https://openalex.org/P4310321074"],"host_organization_lineage_names":["Academic Journals"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"African Journal of Plant Science","raw_type":"journal-article"},"sustainable_development_goals":[{"score":1.0,"id":"https://metadata.un.org/sdg/2","display_name":"Zero hunger"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2965242170.pdf","grobid_xml":"https://content.openalex.org/works/W2965242170.grobid-xml"},"referenced_works_count":29,"referenced_works":["https://openalex.org/W103885994","https://openalex.org/W635420415","https://openalex.org/W1513093864","https://openalex.org/W1534294083","https://openalex.org/W1587775977","https://openalex.org/W1603174332","https://openalex.org/W1976506825","https://openalex.org/W1995112226","https://openalex.org/W1998377360","https://openalex.org/W2000884508","https://openalex.org/W2020622044","https://openalex.org/W2025560344","https://openalex.org/W2036755155","https://openalex.org/W2038833288","https://openalex.org/W2041756571","https://openalex.org/W2042688258","https://openalex.org/W2045046898","https://openalex.org/W2069093199","https://openalex.org/W2091961096","https://openalex.org/W2092103432","https://openalex.org/W2107866341","https://openalex.org/W2119779144","https://openalex.org/W2121317403","https://openalex.org/W2137614083","https://openalex.org/W2142682779","https://openalex.org/W2186639336","https://openalex.org/W2319459467","https://openalex.org/W4285719527","https://openalex.org/W7014858820"],"related_works":["https://openalex.org/W2924463404","https://openalex.org/W4409950461","https://openalex.org/W769203937","https://openalex.org/W2806634599","https://openalex.org/W3174599903","https://openalex.org/W1975969956","https://openalex.org/W4387813114","https://openalex.org/W2480143000","https://openalex.org/W4396612110","https://openalex.org/W2588270010"],"abstract_inverted_index":{"Genotype":[0],"by":[1],"environment":[2],"interaction":[3],"results":[4,108],"in":[5,8,15,49,75,96,125,140,148,152,155,164,187,194,197,225,247,262],"significant":[6],"differences":[7],"the":[9,60,174,199,219,227,236],"performance":[10],"of":[11,30,55,62,136,181],"cultivars":[12,25,251],"when":[13],"tested":[14],"diverse":[16],"environments.":[17],"Nine":[18],"improved":[19],"cowpea":[20,52],"(Vigna":[21],"unguiculata":[22],"(L.)":[23],"Walp)":[24],"obtained":[26],"from":[27],"International":[28],"Institute":[29],"Tropical":[31],"Agriculture":[32],"(IITA),":[33],"Ibadan,":[34],"Nigeria":[35,58],"and":[36,45,67,84,93,118,128,144,160,166,183,189,205,211,259,270],"a":[37,50],"local":[38],"check":[39],"were":[40,203],"evaluated":[41],"for":[42,209,257],"growth,":[43],"reproductive":[44],"grain":[46,134,179,201,222,239],"yield":[47,117,119,135,180,202,223,271],"components":[48,120],"non-traditional":[51],"growing":[53],"region":[54],"south":[56,263],"eastern":[57,264],"with":[59,104,241],"aim":[61],"identifying":[63],"high":[64],"yielding":[65],"genotypes":[66],"optimum":[68],"planting":[69,112,123,142,151,168,191,213,273],"date.":[70,274],"The":[71,107,249],"study":[72],"was":[73,102,235],"conducted":[74],"two":[76,91,94,250],"locations":[77],"namely":[78],"Mgbakwu":[79],"(06\u00b017\u00ca\u00b9N,":[80],"07\u00b004\u00ca\u00b9E;":[81],"83":[82],"masl)":[83,89],"Ishiagu":[85],"(05\u00b058\u00ca\u00b9N,":[86],"07\u00b034\u00ca\u00b9E;":[87],"197":[88],"across":[90],"years":[92,127],"seasons":[95],"each":[97],"year.":[98],"A":[99],"split-plot":[100],"design":[101],"used":[103],"three":[105],"replications.":[106],"indicated":[109],"that":[110],"early":[111,141,165,188,210,245],"date":[113,124,143],"gave":[114],"significantly":[115],"higher":[116],"than":[121],"late":[122,149,167,190,212],"both":[126],"locations.":[129],"IT":[130,171,216,233],"98K-131-2":[131,217],"produced":[132,158,177],"mean":[133,178,200,221],"1220":[137],"kg":[138,146,162,185,207],"ha-1":[139,147,163,186,208],"732":[145],"season":[150,246],"Ishiagu,":[153],"while":[154,196,232],"Mgbakwu,":[156,198],"it":[157],"921":[159],"326":[161],"dates,":[169,192,214],"respectively.":[170,215],"97K-556-4":[172,234],"on":[173],"other":[175],"hand":[176],"1154":[182],"424":[184],"respectively":[193],"Ishiagu;":[195],"1594":[204],"251":[206],"exhibited":[218],"highest":[220,238],"attributes":[224],"all":[226],"environments,":[228],"indicating":[229],"broad":[230],"adaptation;":[231],"next":[237],"yielder":[240],"specific":[242],"adaptation":[243],"to":[244,255],"Mgbakwu.":[248],"are":[252],"therefore":[253],"recommended":[254],"farmers":[256],"multiplication":[258],"general":[260],"cultivation":[261],"Nigeria.":[265],"Key":[266],"words:":[267],"Cowpea,":[268],"growth":[269],"components,":[272]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":4},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":4},{"year":2017,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2019-08-13T00:00:00"}