{"id":"https://openalex.org/W2079836068","doi":"https://doi.org/10.2134/agronj2009.0421","title":"Leaf Harvesting Time and Frequency Affect Vegetative and Grain Yield of Cowpea","display_name":"Leaf Harvesting Time and Frequency Affect Vegetative and Grain Yield of Cowpea","publication_year":2010,"publication_date":"2010-05-01","ids":{"openalex":"https://openalex.org/W2079836068","doi":"https://doi.org/10.2134/agronj2009.0421","mag":"2079836068"},"language":"en","primary_location":{"id":"doi:10.2134/agronj2009.0421","doi":"https://doi.org/10.2134/agronj2009.0421","is_oa":false,"landing_page_url":"https://doi.org/10.2134/agronj2009.0421","pdf_url":null,"source":{"id":"https://openalex.org/S139950591","display_name":"Agronomy Journal","issn_l":"0002-1962","issn":["0002-1962","1072-9623","1435-0645"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Agronomy 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/A5005898624","display_name":"Mwanarusi Saidi","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I195931504","display_name":"Egerton University","ror":"https://ror.org/01jk2zc89","country_code":"KE","type":"education","lineage":["https://openalex.org/I195931504"]}],"countries":["KE"],"is_corresponding":false,"raw_author_name":"Mwanarusi Saidi","raw_affiliation_strings":["Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya","institution_ids":["https://openalex.org/I195931504"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5038971725","display_name":"Francis M. Itulya","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I195931504","display_name":"Egerton University","ror":"https://ror.org/01jk2zc89","country_code":"KE","type":"education","lineage":["https://openalex.org/I195931504"]}],"countries":["KE"],"is_corresponding":false,"raw_author_name":"Francis M. Itulya","raw_affiliation_strings":["Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya","institution_ids":["https://openalex.org/I195931504"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017781147","display_name":"Joseph Nyamori Aguyoh","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I195931504","display_name":"Egerton University","ror":"https://ror.org/01jk2zc89","country_code":"KE","type":"education","lineage":["https://openalex.org/I195931504"]}],"countries":["KE"],"is_corresponding":false,"raw_author_name":"Joseph Aguyoh","raw_affiliation_strings":["Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Dep. of Crops, Horticulture and Soils Egerton Univ. P.O. Box 536 Njoro 536 Kenya","institution_ids":["https://openalex.org/I195931504"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5019423171","display_name":"Mathieu Ngouajio","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I87216513","display_name":"Michigan State University","ror":"https://ror.org/05hs6h993","country_code":"US","type":"education","lineage":["https://openalex.org/I87216513"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Mathieu Ngouajio","raw_affiliation_strings":["Michigan State Univ., Dep. of Horticulture 428 Plant and Soil Science Building East Lansing MI 48824"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Michigan State Univ., Dep. of Horticulture 428 Plant and Soil Science Building East Lansing MI 48824","institution_ids":["https://openalex.org/I87216513"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5019423171"],"corresponding_institution_ids":["https://openalex.org/I87216513"],"apc_list":{"value":1800,"currency":"USD","value_usd":1800},"apc_paid":null,"fwci":0.3788,"has_fulltext":false,"cited_by_count":7,"citation_normalized_percentile":{"value":0.65667901,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":95},"biblio":{"volume":"102","issue":"3","first_page":"827","last_page":"833"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13125","display_name":"Agricultural pest management studies","score":0.8784000277519226,"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":0.8784000277519226,"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/T12436","display_name":"Agronomic Practices and Intercropping Systems","score":0.1145000010728836,"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"}},{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.002199999988079071,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/cowpea","display_name":"cowpea","score":0.996999979019165},{"id":"https://openalex.org/keywords/leaf-harvesting","display_name":"leaf harvesting","score":0.8479999899864197},{"id":"https://openalex.org/keywords/harvest-timing","display_name":"harvest time","score":0.6019999980926514},{"id":"https://openalex.org/keywords/harvesting-frequency","display_name":"harvest frequency","score":0.8830000162124634},{"id":"https://openalex.org/keywords/grain-yield","display_name":"grain yield","score":0.7839999794960022},{"id":"https://openalex.org/keywords/leaf-yield","display_name":"leaf yield","score":0.6489999890327454},{"id":"https://openalex.org/keywords/yield-components","display_name":"yield components","score":0.8640000224113464},{"id":"https://openalex.org/keywords/intercropping-with-maize","display_name":"intercropping with maize","score":0.859000027179718},{"id":"https://openalex.org/keywords/dryland-agriculture","display_name":"rainfed agriculture","score":0.37700000405311584}],"concepts":[{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.7335668802261353},{"id":"https://openalex.org/C2779862049","wikidata":"https://www.wikidata.org/wiki/Q132634","display_name":"Vigna","level":2,"score":0.6738681793212891},{"id":"https://openalex.org/C137776501","wikidata":"https://www.wikidata.org/wiki/Q7208270","display_name":"Point of delivery","level":2,"score":0.6333068609237671},{"id":"https://openalex.org/C28731254","wikidata":"https://www.wikidata.org/wiki/Q17146935","display_name":"Monocropping","level":4,"score":0.6221892237663269},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.5966892838478088},{"id":"https://openalex.org/C2776394811","wikidata":"https://www.wikidata.org/wiki/Q3634497","display_name":"Cropping system","level":3,"score":0.5323892831802368},{"id":"https://openalex.org/C134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","level":2,"score":0.5282142758369446},{"id":"https://openalex.org/C197321923","wikidata":"https://www.wikidata.org/wiki/Q4886","display_name":"Cultivar","level":2,"score":0.5020167827606201},{"id":"https://openalex.org/C13558536","wikidata":"https://www.wikidata.org/wiki/Q785116","display_name":"Cropping","level":3,"score":0.48935621976852417},{"id":"https://openalex.org/C2781208722","wikidata":"https://www.wikidata.org/wiki/Q853859","display_name":"Intercropping","level":2,"score":0.4469432830810547},{"id":"https://openalex.org/C137580998","wikidata":"https://www.wikidata.org/wiki/Q235352","display_name":"Crop","level":2,"score":0.29642727971076965},{"id":"https://openalex.org/C118518473","wikidata":"https://www.wikidata.org/wiki/Q11451","display_name":"Agriculture","level":2,"score":0.15681326389312744},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","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},{"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:10.2134/agronj2009.0421","doi":"https://doi.org/10.2134/agronj2009.0421","is_oa":false,"landing_page_url":"https://doi.org/10.2134/agronj2009.0421","pdf_url":null,"source":{"id":"https://openalex.org/S139950591","display_name":"Agronomy Journal","issn_l":"0002-1962","issn":["0002-1962","1072-9623","1435-0645"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","norway-1","poland-100","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320595","host_organization_name":"Wiley","host_organization_lineage":["https://openalex.org/P4310320595"],"host_organization_lineage_names":["Wiley"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Agronomy Journal","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Zero hunger","score":1.0,"id":"https://metadata.un.org/sdg/2"}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306115","display_name":"United States Agency for International Development","ror":"https://ror.org/01n6e6j62"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":15,"referenced_works":["https://openalex.org/W376354339","https://openalex.org/W635420415","https://openalex.org/W1571474261","https://openalex.org/W1968484691","https://openalex.org/W1992130047","https://openalex.org/W2011929210","https://openalex.org/W2021215693","https://openalex.org/W2040385183","https://openalex.org/W2053443100","https://openalex.org/W2063235321","https://openalex.org/W2118332347","https://openalex.org/W2147795507","https://openalex.org/W2161691830","https://openalex.org/W2401140749","https://openalex.org/W6995999462"],"related_works":["https://openalex.org/W2992085759","https://openalex.org/W2242398098","https://openalex.org/W2743541788","https://openalex.org/W4415952745","https://openalex.org/W2053443100","https://openalex.org/W1594252083","https://openalex.org/W2021215693","https://openalex.org/W4283739924","https://openalex.org/W2520799449","https://openalex.org/W3178942681"],"abstract_inverted_index":{"Cowpea":[0,71],"[Vigna":[1],"unguiculata":[2],"(L.)":[3],"Walp.]":[4],"is":[5],"a":[6,77,178,188],"vital":[7],"component":[8],"of":[9,29,37,54,114,216],"traditional":[10],"cropping":[11,39],"systems":[12],"in":[13,146,149,167],"the":[14,35,61,168],"subtropics":[15],"and":[16,23,41,47,51,96,128,130,138,163,171,206],"tropics,":[17],"grown":[18,75],"both":[19],"for":[20],"high\u2010protein":[21],"grain":[22,131,172,194],"nutritious":[24],"fresh":[25],"leaves.":[26],"The":[27,112],"objectives":[28],"this":[30,217],"study":[31,218],"were":[32,58,133,198],"to":[33,143,192,227],"determine":[34],"effects":[36],"(i)":[38],"regime":[40],"(ii)":[42],"leaf":[43,110,159,170,185,204,209],"harvesting":[44,84,153,160,210],"initiation":[45],"time":[46],"frequency":[48],"on":[49],"yield":[50,52,156],"components":[53],"dual\u2010purpose":[55,221],"cowpea.":[56,151],"Studies":[57],"conducted":[59],"at":[60,87,99,161,177],"Kenya":[62],"National":[63],"Dry":[64],"land":[65],"Research":[66],"Center\u2013Katumani":[67],"over":[68],"four":[69],"seasons.":[70],"cultivar":[72],"\u2018K80\u2019":[73],"was":[74,85,141,181,211],"as":[76],"monocrop":[78],"or":[79,90,101],"intercropped":[80,147],"with":[81,108,183,202],"maize.":[82],"Leaf":[83,152],"initiated":[86,212],"2,":[88],"3,":[89],"4":[91,164],"wk":[92],"after":[93],"emergence":[94],"(WAE)":[95],"thereafter":[97],"done":[98],"7\u2010":[100],"14\u2010d":[102,189],"intervals.":[103],"Control":[104],"plants":[105],"remained":[106],"intact":[107],"no":[109,203],"harvesting.":[111],"number":[113],"lateral":[115],"stems":[116],"per":[117,120,123],"plant,":[118,121],"pods":[119],"seeds":[122],"pod,":[124],"unit":[125],"seed":[126],"weight,":[127],"vegetable":[129],"yields":[132,197,225],"monitored":[134],"throughout":[135],"each":[136],"season,":[137],"plant":[139],"productivity":[140],"found":[142],"be":[144],"lower":[145],"than":[148],"monocropped":[150],"reduced":[154],"all":[155],"components.":[157],"Initiating":[158],"3":[162],"WAE":[165],"resulted":[166],"highest":[169,199],"yields,":[173],"respectively.":[174],"Harvesting":[175],"leaves":[176],"7\u2010d":[179],"interval":[180,190],"associated":[182],"higher":[184,193],"yield,":[186],"while":[187],"led":[191],"yield.":[195],"Overall,":[196],"under":[200],"treatments":[201],"harvest":[205],"lowest":[207],"when":[208],"2":[213],"WAE.":[214],"Results":[215],"can":[219],"help":[220],"cowpea":[222],"growers":[223],"optimize":[224],"according":[226],"their":[228],"production":[229],"goals.":[230]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}