{"id":"https://openalex.org/W2138957640","doi":"https://doi.org/10.5539/jps.v4n1p35","title":"Economic Evaluation of Foliar NPK Fertilizer on Tea Yields in Kenya","display_name":"Economic Evaluation of Foliar NPK Fertilizer on Tea Yields in Kenya","publication_year":2015,"publication_date":"2015-02-02","ids":{"openalex":"https://openalex.org/W2138957640","doi":"https://doi.org/10.5539/jps.v4n1p35","mag":"2138957640"},"language":"en","primary_location":{"id":"doi:10.5539/jps.v4n1p35","doi":"https://doi.org/10.5539/jps.v4n1p35","is_oa":true,"landing_page_url":"https://doi.org/10.5539/jps.v4n1p35","pdf_url":"http://www.ccsenet.org/journal/index.php/jps/article/download/44912/24438","source":{"id":"https://openalex.org/S2764952999","display_name":"Journal of Plant Studies","issn_l":"1927-0461","issn":["1927-0461","1927-047X"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core"],"host_organization":"https://openalex.org/P4310322531","host_organization_name":"Canadian Center of Science and Education","host_organization_lineage":["https://openalex.org/P4310322531"],"host_organization_lineage_names":["Canadian Center of Science and Education"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Plant Studies","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"http://www.ccsenet.org/journal/index.php/jps/article/download/44912/24438","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5060950445","display_name":"Rachael E. N. Njogu","orcid":"https://orcid.org/0000-0002-1435-8412","observed_orcids":["https://orcid.org/0000-0002-1435-8412"]},"institutions":[{"id":"https://openalex.org/I12859529","display_name":"University of Nairobi","ror":"https://ror.org/02y9nww90","country_code":"KE","type":"education","lineage":["https://openalex.org/I12859529"]}],"countries":["KE"],"is_corresponding":false,"raw_author_name":"Rachael Njeri E. Njogu","raw_affiliation_strings":["Department of Chemistry, University of Nairobi, Nairobi, Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry, University of Nairobi, Nairobi, Kenya","institution_ids":["https://openalex.org/I12859529"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004131807","display_name":"David Kariuki","orcid":"https://orcid.org/0009-0003-6159-1107","observed_orcids":["https://orcid.org/0009-0003-6159-1107"]},"institutions":[{"id":"https://openalex.org/I12859529","display_name":"University of Nairobi","ror":"https://ror.org/02y9nww90","country_code":"KE","type":"education","lineage":["https://openalex.org/I12859529"]}],"countries":["KE"],"is_corresponding":false,"raw_author_name":"David K. Kariuki","raw_affiliation_strings":["Department of Chemistry , University of Nairobi , Nairobi , Kenya","University of Nairobi,"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry , University of Nairobi , Nairobi , Kenya","institution_ids":["https://openalex.org/I12859529"]},{"raw_affiliation_string":"University of Nairobi,","institution_ids":["https://openalex.org/I12859529"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5110543862","display_name":"D. M. Kamau","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"David M. Kamau","raw_affiliation_strings":["Tea Research Foundation of Kenya, Kericho, Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tea Research Foundation of Kenya, Kericho, Kenya","institution_ids":[]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5027899642","display_name":"Francis Nyamu Wachira","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Francis N. Wachira","raw_affiliation_strings":["Tea Research Foundation of Kenya, Kericho, Kenya"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tea Research Foundation of Kenya, Kericho, Kenya","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.3938,"has_fulltext":true,"cited_by_count":3,"citation_normalized_percentile":{"value":0.70394312,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":93},"biblio":{"volume":"4","issue":"1","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.9907000064849854,"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"}},"topics":[{"id":"https://openalex.org/T12294","display_name":"Agricultural Science and Fertilization","score":0.9907000064849854,"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/T12754","display_name":"Plant Growth and Agriculture Techniques","score":0.00419999985024333,"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/T12407","display_name":"Plant Growth Enhancement Techniques","score":0.0007999999797903001,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/foliar-fertilization","display_name":"foliar fertilization","score":0.9409999847412109},{"id":"https://openalex.org/keywords/npk-fertilizer","display_name":"NPK fertilizer","score":0.9940000176429749},{"id":"https://openalex.org/keywords/tea-yield","display_name":"tea yield","score":0.875},{"id":"https://openalex.org/keywords/tea-varieties","display_name":"tea varieties","score":0.734000027179718},{"id":"https://openalex.org/keywords/soil-fertilizer","display_name":"soil fertilizer","score":0.7020000219345093},{"id":"https://openalex.org/keywords/fertilizer-dose","display_name":"fertilizer dose","score":0.6690000295639038},{"id":"https://openalex.org/keywords/economic-profitability","display_name":"economic profitability","score":0.5339999794960022},{"id":"https://openalex.org/keywords/kenyan-highlands","display_name":"Kenya highlands","score":0.75}],"concepts":[{"id":"https://openalex.org/C2780560099","wikidata":"https://www.wikidata.org/wiki/Q83323","display_name":"Fertilizer","level":2,"score":0.7773230075836182},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.6375056505203247},{"id":"https://openalex.org/C134121241","wikidata":"https://www.wikidata.org/wiki/Q899301","display_name":"Yield (engineering)","level":2,"score":0.5875126123428345},{"id":"https://openalex.org/C6557445","wikidata":"https://www.wikidata.org/wiki/Q173113","display_name":"Agronomy","level":1,"score":0.37807488441467285},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.3750472664833069},{"id":"https://openalex.org/C144027150","wikidata":"https://www.wikidata.org/wiki/Q48803","display_name":"Horticulture","level":1,"score":0.34272104501724243},{"id":"https://openalex.org/C140793950","wikidata":"https://www.wikidata.org/wiki/Q168091","display_name":"Animal science","level":1,"score":0.33847546577453613},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.12320026755332947},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"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:10.5539/jps.v4n1p35","doi":"https://doi.org/10.5539/jps.v4n1p35","is_oa":true,"landing_page_url":"https://doi.org/10.5539/jps.v4n1p35","pdf_url":"http://www.ccsenet.org/journal/index.php/jps/article/download/44912/24438","source":{"id":"https://openalex.org/S2764952999","display_name":"Journal of Plant Studies","issn_l":"1927-0461","issn":["1927-0461","1927-047X"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core"],"host_organization":"https://openalex.org/P4310322531","host_organization_name":"Canadian Center of Science and Education","host_organization_lineage":["https://openalex.org/P4310322531"],"host_organization_lineage_names":["Canadian Center of Science and Education"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Plant Studies","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.5539/jps.v4n1p35","doi":"https://doi.org/10.5539/jps.v4n1p35","is_oa":true,"landing_page_url":"https://doi.org/10.5539/jps.v4n1p35","pdf_url":"http://www.ccsenet.org/journal/index.php/jps/article/download/44912/24438","source":{"id":"https://openalex.org/S2764952999","display_name":"Journal of Plant Studies","issn_l":"1927-0461","issn":["1927-0461","1927-047X"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core"],"host_organization":"https://openalex.org/P4310322531","host_organization_name":"Canadian Center of Science and Education","host_organization_lineage":["https://openalex.org/P4310322531"],"host_organization_lineage_names":["Canadian Center of Science and Education"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Journal of Plant Studies","raw_type":"journal-article"},"sustainable_development_goals":[{"score":0.991100013256073,"display_name":"Zero hunger","id":"https://metadata.un.org/sdg/2"}],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2138957640.pdf","grobid_xml":"https://content.openalex.org/works/W2138957640.grobid-xml"},"referenced_works_count":11,"referenced_works":["https://openalex.org/W157493073","https://openalex.org/W181015565","https://openalex.org/W1602056073","https://openalex.org/W1882604548","https://openalex.org/W1970083289","https://openalex.org/W1974088474","https://openalex.org/W1995660782","https://openalex.org/W2036923528","https://openalex.org/W2095010315","https://openalex.org/W2095497324","https://openalex.org/W2145956036"],"related_works":["https://openalex.org/W7037359108","https://openalex.org/W2360021642","https://openalex.org/W1882604548","https://openalex.org/W3127946176","https://openalex.org/W2275908482","https://openalex.org/W2901118844","https://openalex.org/W3168566235","https://openalex.org/W4410443246","https://openalex.org/W2225257856","https://openalex.org/W2223354029"],"abstract_inverted_index":{"Economic":[0],"evaluation":[1],"analysis":[2,71],"of":[3,15,35,56],"foliar":[4,41],"(NPK)":[5],"fertilizer":[6,42,142],"on":[7,12,27],"tea":[8,16],"yields":[9],"was":[10,25],"investigated":[11],"three":[13,28],"varieties":[14],"grown":[17],"in":[18,72,135,157,176,188],"the":[19,68],"Kenyan":[20],"Highlands.":[21],"Foliar":[22,44,49],"fertilizers":[23],"trial":[24],"setup":[26],"sites,":[29],"Meru,":[30],"Kirinyaga":[31,144,191],"and":[32,48,60,105,128,130,150,152,171,174,183,190],"Kericho,":[33],"comprising":[34],"36":[36],"plots":[37],"per":[38],"site.":[39,159],"Two":[40],"types,":[43],"Fertilizer":[45,50,58],"1":[46],"(FF1)":[47],"2":[51],"(FF2),":[52],"a":[53,61],"positive":[54],"control":[55],"Soil":[57],"(SF)":[59],"blank":[62],"(FF0)":[63],"were":[64,120],"used":[65],"to":[66,122],"standardize":[67],"method.":[69],"Yield":[70],"Meru":[73,158,177],"site":[74],"showed":[75],"significant":[76,87],"increase":[77,113],"(HSD=4.9,":[78],"p?0.05)":[79,101],"after":[80,114],"FF1":[81,127,156,173,182],"full":[82,104,124,153,179],"rate":[83,96,125,132,139,147,154,165,180,185],"application.":[84,116],"SF":[85,129,151,167],"had":[86,110],"yield":[88,112],"increases":[89],"for":[90,102,126,133,140,148,155,166,172,181,186],"all":[91,141,169],"its":[92,115],"rates":[93,107,119,162],"from":[94],"zero":[95],"(HSD=":[97],"49,":[98],"44,":[99],"19,":[100],"half,":[103],"double":[106,146,164],"respectively.":[108,193],"FF2":[109,134,149,175,187],"no":[111],"The":[117,160],"economic":[118],"determined":[121],"be":[123],"half":[131,138,184],"Kericho":[136,189],"site;":[137,145,178],"types":[143],"profitable":[161],"were:":[163],"across":[168],"sites":[170,192]},"counts_by_year":[{"year":2022,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-10-30T12:39:25.321706","created_date":"2016-06-24T00:00:00"}
